diff --git a/src/api/gramjs/apiBuilders/chats.ts b/src/api/gramjs/apiBuilders/chats.ts
index 428d72270..fc4189f00 100644
--- a/src/api/gramjs/apiBuilders/chats.ts
+++ b/src/api/gramjs/apiBuilders/chats.ts
@@ -274,10 +274,14 @@ export function buildChatMember(
 
   return {
     userId,
-    inviterId: 'inviterId' in member ? buildApiPeerId(member.inviterId as BigInt.BigInteger, 'user') : undefined,
+    inviterId: 'inviterId' in member && member.inviterId
+      ? buildApiPeerId(member.inviterId as BigInt.BigInteger, 'user')
+      : undefined,
     joinedDate: 'date' in member ? member.date : undefined,
-    kickedByUserId: 'kickedBy' in member ? buildApiPeerId(member.kickedBy, 'user') : undefined,
-    promotedByUserId: 'promotedBy' in member ? buildApiPeerId(member.promotedBy, 'user') : undefined,
+    kickedByUserId: 'kickedBy' in member && member.kickedBy ? buildApiPeerId(member.kickedBy, 'user') : undefined,
+    promotedByUserId: 'promotedBy' in member && member.promotedBy
+      ? buildApiPeerId(member.promotedBy, 'user')
+      : undefined,
     bannedRights: 'bannedRights' in member ? omitVirtualClassFields(member.bannedRights) : undefined,
     adminRights: 'adminRights' in member ? omitVirtualClassFields(member.adminRights) : undefined,
     customTitle: 'rank' in member ? member.rank : undefined,
diff --git a/src/api/gramjs/apiBuilders/messages.ts b/src/api/gramjs/apiBuilders/messages.ts
index 93e1a428f..2167e05e9 100644
--- a/src/api/gramjs/apiBuilders/messages.ts
+++ b/src/api/gramjs/apiBuilders/messages.ts
@@ -210,7 +210,7 @@ export function buildApiMessageWithChatId(chatId: string, mtpMessage: UniversalM
     ...(shouldHideKeyboardButtons && { shouldHideKeyboardButtons }),
     ...(mtpMessage.viaBotId && { viaBotId: buildApiPeerId(mtpMessage.viaBotId, 'user') }),
     ...(replies?.comments && { threadInfo: buildThreadInfo(replies, mtpMessage.id, chatId) }),
-    ...(postAuthor && { adminTitle: postAuthor }),
+    ...(postAuthor && { postAuthorTitle: postAuthor }),
     isProtected,
     isForwardingAllowed,
   };
@@ -399,7 +399,7 @@ function buildApiMessageForwardInfo(fwdFrom: GramJs.MessageFwdHeader, isChatWith
     fromMessageId: fwdFrom.savedFromMsgId || fwdFrom.channelPost,
     senderUserId: fromId,
     hiddenUserName: fwdFrom.fromName,
-    adminTitle: fwdFrom.postAuthor,
+    postAuthorTitle: fwdFrom.postAuthor,
   };
 }
 
diff --git a/src/api/gramjs/methods/chats.ts b/src/api/gramjs/methods/chats.ts
index 6507aa75d..719d53a9b 100644
--- a/src/api/gramjs/methods/chats.ts
+++ b/src/api/gramjs/methods/chats.ts
@@ -385,7 +385,7 @@ async function getFullChatInfo(chatId: string): Promise<FullChatData | undefined
       ...(chatPhoto instanceof GramJs.Photo && { profilePhoto: buildApiPhoto(chatPhoto) }),
       about,
       members,
-      adminMembers,
+      adminMembersById: adminMembers ? buildCollectionByKey(adminMembers, 'userId') : undefined,
       canViewMembers: true,
       botCommands,
       ...(exportedInvite instanceof GramJs.ChatInviteExported && {
@@ -463,7 +463,7 @@ async function getFullChannelInfo(
     canViewParticipants && adminRights && await fetchMembers(id, accessHash, 'kicked')
   ) || {};
   const { members: adminMembers, users: adminUsers, userStatusesById: adminStatusesById } = (
-    canViewParticipants && adminRights && await fetchMembers(id, accessHash, 'admin')
+    canViewParticipants && await fetchMembers(id, accessHash, 'admin')
   ) || {};
   const botCommands = botInfo ? buildApiChatBotCommands(botInfo) : undefined;
 
@@ -506,7 +506,7 @@ async function getFullChannelInfo(
       isPreHistoryHidden: hiddenPrehistory,
       members,
       kickedMembers,
-      adminMembers,
+      adminMembersById: adminMembers ? buildCollectionByKey(adminMembers, 'userId') : undefined,
       groupCallId: call ? String(call.id) : undefined,
       linkedChatId: linkedChatId ? buildApiPeerId(linkedChatId, 'chat') : undefined,
       botCommands,
diff --git a/src/api/types/chats.ts b/src/api/types/chats.ts
index 6c23d9c36..92aa4f167 100644
--- a/src/api/types/chats.ts
+++ b/src/api/types/chats.ts
@@ -86,7 +86,7 @@ export interface ApiChatFullInfo {
   onlineCount?: number;
   members?: ApiChatMember[];
   kickedMembers?: ApiChatMember[];
-  adminMembers?: ApiChatMember[];
+  adminMembersById?: Record<string, ApiChatMember>;
   canViewMembers?: boolean;
   isPreHistoryHidden?: boolean;
   inviteLink?: string;
diff --git a/src/api/types/messages.ts b/src/api/types/messages.ts
index a02104793..6f72da25e 100644
--- a/src/api/types/messages.ts
+++ b/src/api/types/messages.ts
@@ -293,7 +293,7 @@ export interface ApiMessageForwardInfo {
   senderUserId?: string;
   fromMessageId?: number;
   hiddenUserName?: string;
-  adminTitle?: string;
+  postAuthorTitle?: string;
 }
 
 export type ApiMessageEntityDefault = {
@@ -408,7 +408,7 @@ export interface ApiMessage {
   isKeyboardSingleUse?: boolean;
   viaBotId?: string;
   threadInfo?: ApiThreadInfo;
-  adminTitle?: string;
+  postAuthorTitle?: string;
   isScheduled?: boolean;
   shouldHideKeyboardButtons?: boolean;
   isFromScheduled?: boolean;
diff --git a/src/components/common/PrivateChatInfo.tsx b/src/components/common/PrivateChatInfo.tsx
index 9bf477267..43f518c56 100644
--- a/src/components/common/PrivateChatInfo.tsx
+++ b/src/components/common/PrivateChatInfo.tsx
@@ -2,7 +2,9 @@ import React, { useEffect, useCallback, memo } from '../../lib/teact/teact';
 import { getActions, withGlobal } from '../../global';
 
 import type { FC } from '../../lib/teact/teact';
-import type { ApiUser, ApiTypingStatus, ApiUserStatus } from '../../api/types';
+import type {
+  ApiUser, ApiTypingStatus, ApiUserStatus, ApiChatMember,
+} from '../../api/types';
 import type { GlobalState } from '../../global/types';
 import type { AnimationLevel } from '../../types';
 import { MediaViewerOrigin } from '../../types';
@@ -34,6 +36,7 @@ type OwnProps = {
   emojiStatusSize?: number;
   noStatusOrTyping?: boolean;
   noRtl?: boolean;
+  adminMember?: ApiChatMember;
 };
 
 type StateProps =
@@ -67,6 +70,7 @@ const PrivateChatInfo: FC<OwnProps & StateProps> = ({
   animationLevel,
   lastSyncTime,
   serverTimeOffset,
+  adminMember,
 }) => {
   const {
     loadFullUser,
@@ -131,6 +135,10 @@ const PrivateChatInfo: FC<OwnProps & StateProps> = ({
     );
   }
 
+  const customTitle = adminMember
+    ? adminMember.customTitle || lang(adminMember.isOwner ? 'GroupInfo.LabelOwner' : 'GroupInfo.LabelAdmin')
+    : undefined;
+
   return (
     <div className="ChatInfo" dir={!noRtl && lang.isRtl ? 'rtl' : undefined}>
       <Avatar
@@ -143,12 +151,15 @@ const PrivateChatInfo: FC<OwnProps & StateProps> = ({
         animationLevel={animationLevel}
       />
       <div className="info">
-        <FullNameTitle
-          peer={user}
-          withEmojiStatus
-          emojiStatusSize={emojiStatusSize}
-          isSavedMessages={isSavedMessages}
-        />
+        <div className="info-name-title">
+          <FullNameTitle
+            peer={user}
+            withEmojiStatus
+            emojiStatusSize={emojiStatusSize}
+            isSavedMessages={isSavedMessages}
+          />
+          {customTitle && <span className="custom-title">{customTitle}</span>}
+        </div>
         {(status || (!isSavedMessages && !noStatusOrTyping)) && renderStatusOrTyping()}
       </div>
     </div>
diff --git a/src/components/middle/MiddleColumn.tsx b/src/components/middle/MiddleColumn.tsx
index 9a432200b..6f045f7af 100644
--- a/src/components/middle/MiddleColumn.tsx
+++ b/src/components/middle/MiddleColumn.tsx
@@ -45,7 +45,7 @@ import {
   selectTheme,
 } from '../../global/selectors';
 import {
-  getCanPostInChat, getMessageSendingRestrictionReason, isChatChannel, isChatSuperGroup, isUserId,
+  getCanPostInChat, getMessageSendingRestrictionReason, isChatChannel, isChatGroup, isChatSuperGroup, isUserId,
 } from '../../global/helpers';
 import captureEscKeyListener from '../../util/captureEscKeyListener';
 import buildClassName from '../../util/buildClassName';
@@ -108,6 +108,7 @@ type StateProps = {
   canSubscribe?: boolean;
   canStartBot?: boolean;
   canRestartBot?: boolean;
+  shouldLoadFullChat?: boolean;
   activeEmojiInteractions?: ActiveEmojiInteraction[];
   shouldJoinToSend?: boolean;
   shouldSendJoinRequest?: boolean;
@@ -154,6 +155,7 @@ const MiddleColumn: FC<StateProps> = ({
   activeEmojiInteractions,
   shouldJoinToSend,
   shouldSendJoinRequest,
+  shouldLoadFullChat,
   lastSyncTime,
 }) => {
   const {
@@ -168,6 +170,7 @@ const MiddleColumn: FC<StateProps> = ({
     sendBotCommand,
     restartBot,
     showNotification,
+    loadFullChat,
   } = getActions();
 
   const { width: windowWidth } = useWindowSize();
@@ -264,6 +267,12 @@ const MiddleColumn: FC<StateProps> = ({
     }
   }, [chatId, isPrivate, areChatSettingsLoaded, lastSyncTime, loadChatSettings]);
 
+  useEffect(() => {
+    if (chatId && shouldLoadFullChat && isReady) {
+      loadFullChat({ chatId });
+    }
+  }, [shouldLoadFullChat, chatId, isReady, loadFullChat]);
+
   const handleDragEnter = useCallback((e: React.DragEvent<HTMLDivElement>) => {
     if (IS_TOUCH_ENV) {
       return;
@@ -616,6 +625,7 @@ export default memo(withGlobal(
     const shouldSendJoinRequest = Boolean(chat?.isNotJoined && chat.isJoinRequest);
     const canRestartBot = Boolean(bot && selectIsUserBlocked(global, bot.id));
     const canStartBot = !canRestartBot && isBotNotStarted;
+    const shouldLoadFullChat = Boolean(chat && isChatGroup(chat) && !chat.fullInfo && lastSyncTime);
 
     return {
       ...state,
@@ -645,6 +655,7 @@ export default memo(withGlobal(
       canRestartBot,
       shouldJoinToSend,
       shouldSendJoinRequest,
+      shouldLoadFullChat,
     };
   },
 )(MiddleColumn));
diff --git a/src/components/middle/composer/Composer.tsx b/src/components/middle/composer/Composer.tsx
index f2cff7341..1515c5cb7 100644
--- a/src/components/middle/composer/Composer.tsx
+++ b/src/components/middle/composer/Composer.tsx
@@ -280,7 +280,6 @@ const Composer: FC<OwnProps & StateProps> = ({
     addRecentEmoji,
     sendInlineBotResult,
     loadSendAs,
-    loadFullChat,
     resetOpenChatWithDraft,
     callAttachBot,
     openLimitReachedModal,
@@ -334,12 +333,6 @@ const Composer: FC<OwnProps & StateProps> = ({
     }
   }, [chat, chatId, isReady, lastSyncTime, loadSendAs, sendAsPeerIds]);
 
-  useEffect(() => {
-    if (chatId && chat && lastSyncTime && !chat.fullInfo && isReady && isChatSuperGroup(chat)) {
-      loadFullChat({ chatId });
-    }
-  }, [chat, chatId, isReady, lastSyncTime, loadFullChat]);
-
   const shouldAnimateSendAsButtonRef = useRef(false);
   useOnChange(([prevChatId, prevSendAsPeerIds]) => {
     // We only animate send-as button if `sendAsPeerIds` was missing when opening the chat
diff --git a/src/components/middle/message/Message.tsx b/src/components/middle/message/Message.tsx
index f9921e950..409c55581 100644
--- a/src/components/middle/message/Message.tsx
+++ b/src/components/middle/message/Message.tsx
@@ -17,6 +17,7 @@ import type {
   ApiChat,
   ApiThreadInfo,
   ApiAvailableReaction,
+  ApiChatMember,
 } from '../../../api/types';
 import type {
   AnimationLevel, FocusDirection, IAlbum, ISettings,
@@ -74,7 +75,9 @@ import {
   areReactionsEmpty,
   getMessageHtmlId,
   isGeoLiveExpired,
-  getMessageSingleCustomEmoji, hasMessageText,
+  getMessageSingleCustomEmoji,
+  hasMessageText,
+  isChatGroup,
 } from '../../../global/helpers';
 import buildClassName from '../../../util/buildClassName';
 import useEnsureMessage from '../../../hooks/useEnsureMessage';
@@ -183,6 +186,7 @@ type StateProps = {
   isChatWithSelf?: boolean;
   isRepliesChat?: boolean;
   isChannel?: boolean;
+  isGroup?: boolean;
   canReply?: boolean;
   lastSyncTime?: number;
   serverTimeOffset: number;
@@ -211,6 +215,7 @@ type StateProps = {
   isTranscriptionError?: boolean;
   isPremium: boolean;
   animationLevel: AnimationLevel;
+  senderAdminMember?: ApiChatMember;
 };
 
 type MetaPosition =
@@ -275,6 +280,7 @@ const Message: FC<OwnProps & StateProps> = ({
   isChatWithSelf,
   isRepliesChat,
   isChannel,
+  isGroup,
   canReply,
   lastSyncTime,
   serverTimeOffset,
@@ -301,6 +307,7 @@ const Message: FC<OwnProps & StateProps> = ({
   hasUnreadReaction,
   memoFirstUnreadIdRef,
   animationLevel,
+  senderAdminMember,
 }) => {
   const {
     toggleMessageSelection,
@@ -615,7 +622,9 @@ const Message: FC<OwnProps & StateProps> = ({
     style = `width: ${calculatedWidth + extraPadding}px`;
   }
 
-  const signature = (isChannel && message.adminTitle) || (!asForwarded && forwardInfo?.adminTitle) || undefined;
+  const signature = (isChannel && message.postAuthorTitle)
+    || (!asForwarded && forwardInfo?.postAuthorTitle)
+    || undefined;
   const metaSafeAuthorWidth = useMemo(() => {
     return signature ? calculateAuthorWidth(signature) : undefined;
   }, [signature]);
@@ -984,13 +993,23 @@ const Message: FC<OwnProps & StateProps> = ({
         )}
         {forwardInfo?.isLinkedChannelPost ? (
           <span className="admin-title" dir="auto">{lang('DiscussChannel')}</span>
-        ) : message.adminTitle && !isChannel ? (
-          <span className="admin-title" dir="auto">{message.adminTitle}</span>
+        ) : message.forwardInfo?.postAuthorTitle && isGroup && asForwarded ? (
+          <span className="admin-title" dir="auto">{message.forwardInfo?.postAuthorTitle}</span>
+        ) : message.postAuthorTitle && isGroup && !asForwarded ? (
+          <span className="admin-title" dir="auto">{message.postAuthorTitle}</span>
+        ) : senderAdminMember && !asForwarded ? (
+          <span className="admin-title" dir="auto">
+            {senderAdminMember.customTitle || lang(
+              senderAdminMember.isOwner ? 'GroupInfo.LabelOwner' : 'GroupInfo.LabelAdmin',
+            )}
+          </span>
         ) : undefined}
       </div>
     );
   }
 
+  const forwardAuthor = isGroup && asForwarded ? message.postAuthorTitle : undefined;
+
   return (
     <div
       ref={ref}
@@ -1040,7 +1059,10 @@ const Message: FC<OwnProps & StateProps> = ({
           dir="auto"
         >
           {asForwarded && !isInDocumentGroupNotFirst && (
-            <div className="message-title">{lang('ForwardedMessage')}</div>
+            <div className="message-title">
+              {lang('ForwardedMessage')}
+              {forwardAuthor && <span className="admin-title" dir="auto">{forwardAuthor}</span>}
+            </div>
           )}
           {renderContent()}
           {!isInDocumentGroupNotLast && metaPosition === 'standalone' && renderReactionsAndMeta()}
@@ -1124,13 +1146,18 @@ export default memo(withGlobal<OwnProps>(
     const isChatWithSelf = selectIsChatWithSelf(global, chatId);
     const isRepliesChat = isChatWithRepliesBot(chatId);
     const isChannel = chat && isChatChannel(chat);
+    const isGroup = chat && isChatGroup(chat);
     const chatUsername = chat?.username;
 
+    const isForwarding = forwardMessages.messageIds && forwardMessages.messageIds.includes(id);
     const forceSenderName = !isChatWithSelf && isAnonymousOwnMessage(message);
     const canShowSender = withSenderName || withAvatar || forceSenderName;
     const sender = selectSender(global, message);
     const originSender = selectForwardedSender(global, message);
     const botSender = viaBotId ? selectUser(global, viaBotId) : undefined;
+    const senderAdminMember = sender?.id && isGroup
+      ? chat.fullInfo?.adminMembersById?.[sender?.id]
+      : undefined;
 
     const threadTopMessageId = threadId ? selectThreadTopMessageId(global, chatId, threadId) : undefined;
     const isThreadTop = message.id === threadTopMessageId;
@@ -1152,8 +1179,6 @@ export default memo(withGlobal<OwnProps>(
       direction: focusDirection, noHighlight: noFocusHighlight, isResizingContainer,
     } = (isFocused && focusedMessage) || {};
 
-    const isForwarding = forwardMessages.messageIds && forwardMessages.messageIds.includes(id);
-
     const { query: highlight } = selectCurrentTextSearch(global) || {};
 
     const singleEmoji = getMessageSingleRegularEmoji(message);
@@ -1206,6 +1231,7 @@ export default memo(withGlobal<OwnProps>(
       isChatWithSelf,
       isRepliesChat,
       isChannel,
+      isGroup,
       canReply,
       lastSyncTime,
       serverTimeOffset,
@@ -1239,6 +1265,7 @@ export default memo(withGlobal<OwnProps>(
       transcribedText: transcriptionId !== undefined ? global.transcriptions[transcriptionId]?.text : undefined,
       isPremium: selectIsCurrentUserPremium(global),
       animationLevel: global.settings.byKey.animationLevel,
+      senderAdminMember,
     };
   },
 )(Message));
diff --git a/src/components/right/Profile.tsx b/src/components/right/Profile.tsx
index 42bf538e1..0c40fcc86 100644
--- a/src/components/right/Profile.tsx
+++ b/src/components/right/Profile.tsx
@@ -85,6 +85,7 @@ type StateProps = {
   canAddMembers?: boolean;
   canDeleteMembers?: boolean;
   members?: ApiChatMember[];
+  adminMembersById?: Record<string, ApiChatMember>;
   commonChatIds?: string[];
   chatsById: Record<string, ApiChat>;
   usersById: Record<string, ApiUser>;
@@ -126,6 +127,7 @@ const Profile: FC<OwnProps & StateProps> = ({
   canDeleteMembers,
   commonChatIds,
   members,
+  adminMembersById,
   usersById,
   userStatusesById,
   chatsById,
@@ -416,7 +418,7 @@ const Profile: FC<OwnProps & StateProps> = ({
               onClick={() => handleMemberClick(id)}
               contextActions={getMemberContextAction(id)}
             >
-              <PrivateChatInfo userId={id} forceShowSelf />
+              <PrivateChatInfo userId={id} adminMember={adminMembersById?.[id]} forceShowSelf />
             </ListItem>
           ))
         ) : resultType === 'commonChats' ? (
@@ -524,6 +526,7 @@ export default memo(withGlobal<OwnProps>(
     const isChannel = chat && isChatChannel(chat);
     const hasMembersTab = isGroup || (isChannel && isChatAdmin(chat!));
     const members = chat?.fullInfo?.members;
+    const adminMembersById = chat?.fullInfo?.adminMembersById;
     const areMembersHidden = hasMembersTab && chat
       && (chat.isForbidden || (chat.fullInfo && !chat.fullInfo.canViewMembers));
     const canAddMembers = hasMembersTab && chat
@@ -562,7 +565,7 @@ export default memo(withGlobal<OwnProps>(
       userStatusesById,
       chatsById,
       isChatProtected: chat?.isProtected,
-      ...(hasMembersTab && members && { members }),
+      ...(hasMembersTab && members && { members, adminMembersById }),
       ...(hasCommonChatsTab && user && { commonChatIds: user.commonChats?.ids }),
     };
   },
diff --git a/src/components/right/management/ManageChannel.tsx b/src/components/right/management/ManageChannel.tsx
index 4d5abb7cf..d721c099a 100644
--- a/src/components/right/management/ManageChannel.tsx
+++ b/src/components/right/management/ManageChannel.tsx
@@ -108,7 +108,7 @@ const ManageChannel: FC<OwnProps & StateProps> = ({
     }
   }, [progress]);
 
-  const adminsCount = (chat?.fullInfo?.adminMembers?.length) || 0;
+  const adminsCount = Object.keys(chat.fullInfo?.adminMembersById || {}).length;
   const removedUsersCount = (chat?.fullInfo?.kickedMembers?.length) || 0;
 
   const handleClickEditType = useCallback(() => {
diff --git a/src/components/right/management/ManageChatAdministrators.tsx b/src/components/right/management/ManageChatAdministrators.tsx
index 4331aae92..aad931005 100644
--- a/src/components/right/management/ManageChatAdministrators.tsx
+++ b/src/components/right/management/ManageChatAdministrators.tsx
@@ -49,11 +49,11 @@ const ManageChatAdministrators: FC<OwnProps & StateProps> = ({
   }, [onScreenSelect]);
 
   const adminMembers = useMemo(() => {
-    if (!chat.fullInfo || !chat.fullInfo.adminMembers) {
+    if (!chat.fullInfo?.adminMembersById) {
       return [];
     }
 
-    return chat.fullInfo.adminMembers.sort((a, b) => {
+    return Object.values(chat.fullInfo.adminMembersById).sort((a, b) => {
       if (a.isOwner) {
         return -1;
       } else if (b.isOwner) {
diff --git a/src/components/right/management/ManageGroup.tsx b/src/components/right/management/ManageGroup.tsx
index 5a9eaeb1b..3715df660 100644
--- a/src/components/right/management/ManageGroup.tsx
+++ b/src/components/right/management/ManageGroup.tsx
@@ -236,7 +236,9 @@ const ManageGroup: FC<OwnProps & StateProps> = ({
     return totalCount;
   }, [chat]);
 
-  const adminsCount = (chat.fullInfo?.adminMembers?.length) || 0;
+  const adminsCount = useMemo(() => {
+    return Object.keys(chat.fullInfo?.adminMembersById || {}).length;
+  }, [chat.fullInfo?.adminMembersById]);
 
   const handleDeleteGroup = useCallback(() => {
     if (isBasicGroup) {
diff --git a/src/components/right/management/ManageGroupAdminRights.tsx b/src/components/right/management/ManageGroupAdminRights.tsx
index 1400f10b9..fe33ab6d5 100644
--- a/src/components/right/management/ManageGroupAdminRights.tsx
+++ b/src/components/right/management/ManageGroupAdminRights.tsx
@@ -70,7 +70,7 @@ const ManageGroupAdminRights: FC<OwnProps & StateProps> = ({
   });
 
   const selectedChatMember = useMemo(() => {
-    const selectedAdminMember = chat.fullInfo?.adminMembers?.find(({ userId }) => userId === selectedUserId);
+    const selectedAdminMember = selectedUserId ? chat.fullInfo?.adminMembersById?.[selectedUserId] : undefined;
 
     // If `selectedAdminMember` variable is filled with a value, then we have already saved the administrator,
     // so now we need to return to the list of administrators
@@ -91,7 +91,7 @@ const ManageGroupAdminRights: FC<OwnProps & StateProps> = ({
     }
 
     return selectedAdminMember;
-  }, [chat.fullInfo?.adminMembers, defaultRights, isNewAdmin, lang, selectedUserId]);
+  }, [chat.fullInfo?.adminMembersById, defaultRights, isNewAdmin, lang, selectedUserId]);
 
   useEffect(() => {
     if (chat?.fullInfo && selectedUserId && !selectedChatMember) {
diff --git a/src/components/right/management/ManageGroupMembers.tsx b/src/components/right/management/ManageGroupMembers.tsx
index 0105ba41a..fa03c92f4 100644
--- a/src/components/right/management/ManageGroupMembers.tsx
+++ b/src/components/right/management/ManageGroupMembers.tsx
@@ -37,7 +37,7 @@ type OwnProps = {
 type StateProps = {
   userStatusesById: Record<string, ApiUserStatus>;
   members?: ApiChatMember[];
-  adminMembers?: ApiChatMember[];
+  adminMembersById?: Record<string, ApiChatMember>;
   isChannel?: boolean;
   localContactIds?: string[];
   searchQuery?: string;
@@ -52,7 +52,7 @@ type StateProps = {
 const ManageGroupMembers: FC<OwnProps & StateProps> = ({
   noAdmins,
   members,
-  adminMembers,
+  adminMembersById,
   userStatusesById,
   isChannel,
   isActive,
@@ -78,8 +78,8 @@ const ManageGroupMembers: FC<OwnProps & StateProps> = ({
   const [deletingUserId, setDeletingUserId] = useState<string | undefined>();
 
   const adminIds = useMemo(() => {
-    return noAdmins ? adminMembers?.map(({ userId }) => userId) || [] : [];
-  }, [adminMembers, noAdmins]);
+    return noAdmins && adminMembersById ? Object.keys(adminMembersById) : [];
+  }, [adminMembersById, noAdmins]);
 
   const memberIds = useMemo(() => {
     // No need for expensive global updates on users, so we avoid them
@@ -233,7 +233,7 @@ export default memo(withGlobal<OwnProps>(
     const chat = selectChat(global, chatId);
     const { statusesById: userStatusesById } = global.users;
     const members = chat?.fullInfo?.members;
-    const adminMembers = chat?.fullInfo?.adminMembers;
+    const adminMembersById = chat?.fullInfo?.adminMembersById;
     const isChannel = chat && isChatChannel(chat);
     const { userIds: localContactIds } = global.contactList || {};
 
@@ -248,7 +248,7 @@ export default memo(withGlobal<OwnProps>(
 
     return {
       members,
-      adminMembers,
+      adminMembersById,
       userStatusesById,
       isChannel,
       localContactIds,
diff --git a/src/components/right/management/ManageGroupRecentActions.tsx b/src/components/right/management/ManageGroupRecentActions.tsx
index 2b88de7c8..adea6f838 100644
--- a/src/components/right/management/ManageGroupRecentActions.tsx
+++ b/src/components/right/management/ManageGroupRecentActions.tsx
@@ -30,11 +30,11 @@ const ManageGroupRecentActions: FC<OwnProps & StateProps> = ({ chat, onClose, is
   });
 
   const adminMembers = useMemo(() => {
-    if (!chat || !chat.fullInfo || !chat.fullInfo.adminMembers) {
+    if (!chat?.fullInfo?.adminMembersById) {
       return [];
     }
 
-    return chat.fullInfo.adminMembers.sort((a, b) => {
+    return Object.values(chat.fullInfo.adminMembersById).sort((a, b) => {
       if (a.isOwner) {
         return -1;
       } else if (b.isOwner) {
diff --git a/src/components/ui/ListItem.scss b/src/components/ui/ListItem.scss
index a6c598b9c..07bc081b1 100644
--- a/src/components/ui/ListItem.scss
+++ b/src/components/ui/ListItem.scss
@@ -165,6 +165,11 @@
       overflow: hidden;
     }
 
+    .info-name-title {
+      display: flex;
+      align-items: center;
+    }
+
     .info-row,
     .title,
     .subtitle {
@@ -211,6 +216,17 @@
       flex-grow: 1;
       overflow: hidden;
 
+      .custom-title {
+        padding-inline-start: 1rem;
+        font-size: 0.875rem;
+        color: var(--color-text-secondary);
+        overflow: hidden;
+        white-space: nowrap;
+        text-overflow: ellipsis;
+        margin-inline-start: auto;
+        flex-shrink: 0;
+      }
+
       .status,
       .typing-status {
         font-size: 0.875rem;
diff --git a/src/global/actions/api/chats.ts b/src/global/actions/api/chats.ts
index 5143cc832..38bd07ef5 100644
--- a/src/global/actions/api/chats.ts
+++ b/src/global/actions/api/chats.ts
@@ -3,7 +3,7 @@ import {
 } from '../../index';
 
 import type {
-  ApiChat, ApiUser, ApiChatFolder, ApiError,
+  ApiChat, ApiUser, ApiChatFolder, ApiError, ApiChatMember,
 } from '../../../api/types';
 import { MAIN_THREAD_ID } from '../../../api/types';
 import { NewChatMembersProgress, ChatCreationProgress, ManagementProgress } from '../../../types';
@@ -867,24 +867,31 @@ addActionHandler('updateChatAdmin', async (global, actions, payload) => {
     return;
   }
 
-  const { adminMembers } = chatAfterUpdate.fullInfo;
+  const { adminMembersById } = chatAfterUpdate.fullInfo;
   const isDismissed = !Object.keys(adminRights).length;
+  let newAdminMembersById: Record<string, ApiChatMember> | undefined;
+  if (adminMembersById) {
+    if (isDismissed) {
+      const { [userId]: remove, ...rest } = adminMembersById;
+      newAdminMembersById = rest;
+    } else {
+      newAdminMembersById = {
+        ...adminMembersById,
+        [userId]: {
+          ...adminMembersById[userId],
+          adminRights,
+          customTitle,
+        },
+      };
+    }
+  }
 
   global = getGlobal();
 
   setGlobal(updateChat(global, chatId, {
     fullInfo: {
       ...chatAfterUpdate.fullInfo,
-      ...(adminMembers && isDismissed && {
-        adminMembers: adminMembers.filter((m) => m.userId !== userId),
-      }),
-      ...(adminMembers && !isDismissed && {
-        adminMembers: adminMembers.map((m) => (
-          m.userId === userId
-            ? { ...m, adminRights, customTitle }
-            : m
-        )),
-      }),
+      ...(newAdminMembersById && { adminMembersById: newAdminMembersById }),
     },
   }));
 });
diff --git a/src/global/actions/apiUpdaters/chats.ts b/src/global/actions/apiUpdaters/chats.ts
index ddfcbeb02..74a2584e9 100644
--- a/src/global/actions/apiUpdaters/chats.ts
+++ b/src/global/actions/apiUpdaters/chats.ts
@@ -3,7 +3,7 @@ import { addActionHandler, getGlobal, setGlobal } from '../../index';
 import { MAIN_THREAD_ID } from '../../../api/types';
 
 import { ARCHIVED_FOLDER_ID, MAX_ACTIVE_PINNED_CHATS } from '../../../config';
-import { pick } from '../../../util/iteratees';
+import { buildCollectionByKey, pick } from '../../../util/iteratees';
 import { closeMessageNotifications, notifyAboutMessage } from '../../../util/notifications';
 import {
   updateChat,
@@ -326,7 +326,7 @@ addActionHandler('apiUpdate', (global, actions, update) => {
           fullInfo: {
             ...targetChat.fullInfo,
             members,
-            adminMembers,
+            adminMembersById: buildCollectionByKey(adminMembers, 'userId'),
           },
         });
       }
diff --git a/src/global/reducers/chats.ts b/src/global/reducers/chats.ts
index 1f5daaecb..063a364fc 100644
--- a/src/global/reducers/chats.ts
+++ b/src/global/reducers/chats.ts
@@ -2,7 +2,7 @@ import type { GlobalState } from '../types';
 import type { ApiChat, ApiChatMember, ApiPhoto } from '../../api/types';
 
 import { ARCHIVED_FOLDER_ID } from '../../config';
-import { areSortedArraysEqual, omit } from '../../util/iteratees';
+import { areSortedArraysEqual, buildCollectionByKey, omit } from '../../util/iteratees';
 import { selectChatListType } from '../selectors';
 
 export function replaceChatListIds(
@@ -242,6 +242,7 @@ export function addChatMembers(global: GlobalState, chat: ApiChat, membersToAdd:
     fullInfo: {
       ...chat.fullInfo,
       members: updatedMembers,
+      adminMembersById: buildCollectionByKey(updatedMembers, 'userId'),
     },
   });
 }