diff --git a/src/components/middle/composer/CustomEmojiButton.tsx b/src/components/middle/composer/CustomEmojiButton.tsx
index 5e31311de..290caa4c4 100644
--- a/src/components/middle/composer/CustomEmojiButton.tsx
+++ b/src/components/middle/composer/CustomEmojiButton.tsx
@@ -2,6 +2,7 @@ import React, { memo, useCallback } from '../../../lib/teact/teact';
 
 import type { FC } from '../../../lib/teact/teact';
 import type { ApiSticker } from '../../../api/types';
+import type { ObserveFn } from '../../../hooks/useIntersectionObserver';
 
 import buildClassName from '../../../util/buildClassName';
 
@@ -15,10 +16,11 @@ type OwnProps = {
   emoji: ApiSticker;
   focus?: boolean;
   onClick?: (emoji: ApiSticker) => void;
+  observeIntersection?: ObserveFn;
 };
 
 const CustomEmojiButton: FC<OwnProps> = ({
-  emoji, focus, onClick,
+  emoji, focus, onClick, observeIntersection,
 }) => {
   const handleClick = useCallback((e: React.MouseEvent<HTMLDivElement, MouseEvent>) => {
     // Preventing safari from losing focus on Composer MessageInput
@@ -38,7 +40,13 @@ const CustomEmojiButton: FC<OwnProps> = ({
       onMouseDown={handleClick}
       title={emoji.emoji}
     >
-      <CustomEmoji documentId={emoji.id} size={CUSTOM_EMOJI_SIZE} withSharedAnimation shouldPreloadPreview />
+      <CustomEmoji
+        documentId={emoji.id}
+        size={CUSTOM_EMOJI_SIZE}
+        withSharedAnimation
+        shouldPreloadPreview
+        observeIntersectionForPlaying={observeIntersection}
+      />
     </div>
   );
 };
diff --git a/src/components/middle/composer/CustomEmojiTooltip.module.scss b/src/components/middle/composer/CustomEmojiTooltip.module.scss
index 06b55e577..287e589d7 100644
--- a/src/components/middle/composer/CustomEmojiTooltip.module.scss
+++ b/src/components/middle/composer/CustomEmojiTooltip.module.scss
@@ -10,7 +10,7 @@
   }
 
   .emojiButton {
-    flex: 0 0 2.5rem;
+    flex: 0 0 2rem;
     --custom-emoji-size: 2rem;
     margin: 0.5rem 0 0.5rem 0.25rem;
   }
diff --git a/src/components/middle/composer/CustomEmojiTooltip.tsx b/src/components/middle/composer/CustomEmojiTooltip.tsx
index 275a03514..e39f2aa17 100644
--- a/src/components/middle/composer/CustomEmojiTooltip.tsx
+++ b/src/components/middle/composer/CustomEmojiTooltip.tsx
@@ -59,7 +59,7 @@ const CustomEmojiTooltip: FC<OwnProps & StateProps> = ({
 
   const {
     observe: observeIntersection,
-  } = useIntersectionObserver({ rootRef: containerRef, throttleMs: INTERSECTION_THROTTLE });
+  } = useIntersectionObserver({ rootRef: containerRef, throttleMs: INTERSECTION_THROTTLE, isDisabled: !isOpen });
 
   useEffect(() => (isOpen ? captureEscKeyListener(onClose) : undefined), [isOpen, onClose]);
 
diff --git a/src/components/middle/composer/EmojiTooltip.tsx b/src/components/middle/composer/EmojiTooltip.tsx
index 8533867d9..a0146137a 100644
--- a/src/components/middle/composer/EmojiTooltip.tsx
+++ b/src/components/middle/composer/EmojiTooltip.tsx
@@ -14,6 +14,7 @@ import useShowTransition from '../../../hooks/useShowTransition';
 import usePrevDuringAnimation from '../../../hooks/usePrevDuringAnimation';
 import { useKeyboardNavigation } from './hooks/useKeyboardNavigation';
 import useHorizontalScroll from '../../../hooks/useHorizontalScroll';
+import { useIntersectionObserver } from '../../../hooks/useIntersectionObserver';
 
 import Loading from '../../ui/Loading';
 import EmojiButton from './EmojiButton';
@@ -64,6 +65,8 @@ export type OwnProps = {
   addRecentCustomEmoji: ({ documentId }: { documentId: string }) => void;
 };
 
+const INTERSECTION_THROTTLE = 200;
+
 const EmojiTooltip: FC<OwnProps> = ({
   isOpen,
   emojis,
@@ -83,6 +86,10 @@ const EmojiTooltip: FC<OwnProps> = ({
 
   useHorizontalScroll(containerRef);
 
+  const {
+    observe: observeIntersection,
+  } = useIntersectionObserver({ rootRef: containerRef, throttleMs: INTERSECTION_THROTTLE, isDisabled: !isOpen });
+
   const handleSelectEmoji = useCallback((emoji: Emoji) => {
     onEmojiSelect(emoji.native);
     addRecentEmoji({ emoji: emoji.id });
@@ -148,6 +155,7 @@ const EmojiTooltip: FC<OwnProps> = ({
               emoji={emoji}
               focus={selectedIndex === index}
               onClick={handleCustomEmojiClick}
+              observeIntersection={observeIntersection}
             />
           )
         ))
diff --git a/src/components/middle/composer/hooks/useEmojiTooltip.ts b/src/components/middle/composer/hooks/useEmojiTooltip.ts
index 2d96fa601..39007d26f 100644
--- a/src/components/middle/composer/hooks/useEmojiTooltip.ts
+++ b/src/components/middle/composer/hooks/useEmojiTooltip.ts
@@ -27,6 +27,7 @@ interface Library {
   byKeyword: Record<string, Emoji[]>;
   names: string[];
   byName: Record<string, Emoji[]>;
+  maxKeyLength: number;
 }
 
 let emojiDataPromise: Promise<EmojiModule>;
@@ -34,6 +35,7 @@ let emojiRawData: EmojiRawData;
 let emojiData: EmojiData;
 
 let RE_EMOJI_SEARCH: RegExp;
+let RE_LOWERCASE_TEST: RegExp;
 const EMOJIS_LIMIT = 36;
 const FILTER_MIN_LENGTH = 2;
 
@@ -44,10 +46,12 @@ const prepareLibraryMemo = memoized(prepareLibrary);
 const searchInLibraryMemo = memoized(searchInLibrary);
 
 try {
-  RE_EMOJI_SEARCH = /(^|\s):[-+_:\p{L}\p{N}]*$/gui;
+  RE_EMOJI_SEARCH = /(^|\s):(?!\s)[-+_:'\s\p{L}\p{N}]*$/gui;
+  RE_LOWERCASE_TEST = /\p{Ll}/u;
 } catch (e) {
   // Support for older versions of firefox
-  RE_EMOJI_SEARCH = /(^|\s):[-+_:\d\wа-яё]*$/gi;
+  RE_EMOJI_SEARCH = /(^|\s):(?!\s)[-+_:'\s\d\wа-яёґєії]*$/gi;
+  RE_LOWERCASE_TEST = /[a-zяёґєії]/;
 }
 
 export default function useEmojiTooltip(
@@ -141,12 +145,13 @@ export default function useEmojiTooltip(
 
     if (!filter) {
       matched = prepareRecentEmojisMemo(byId, recentEmojiIds, EMOJIS_LIMIT);
-    } else if (filter.length >= FILTER_MIN_LENGTH) {
+    } else if ((filter.length === 1 && RE_LOWERCASE_TEST.test(filter)) || filter.length >= FILTER_MIN_LENGTH) {
       const library = prepareLibraryMemo(byId, baseEmojiKeywords, emojiKeywords);
-      matched = searchInLibraryMemo(library, filter, EMOJIS_LIMIT);
+      matched = searchInLibraryMemo(library, filter.toLowerCase(), EMOJIS_LIMIT);
     }
 
     if (!matched.length) {
+      updateFiltered(MEMO_EMPTY_ARRAY);
       return;
     }
 
@@ -172,7 +177,7 @@ export default function useEmojiTooltip(
 
 async function ensureEmojiData() {
   if (!emojiDataPromise) {
-    emojiDataPromise = import('emoji-data-ios/emoji-data.json') as unknown as Promise<EmojiModule>;
+    emojiDataPromise = import('emoji-data-ios/emoji-data.json');
     emojiRawData = (await emojiDataPromise).default;
 
     emojiData = uncompressEmoji(emojiRawData);
@@ -224,21 +229,27 @@ function prepareLibrary(
   }, {} as Record<string, Emoji[]>);
 
   const names = Object.keys(byName);
+  const maxKeyLength = keywords.reduce((max, keyword) => Math.max(max, keyword.length), 0);
 
   return {
     byKeyword,
     keywords,
     byName,
     names,
+    maxKeyLength,
   };
 }
 
 function searchInLibrary(library: Library, filter: string, limit: number) {
   const {
-    byKeyword, keywords, byName, names,
+    byKeyword, keywords, byName, names, maxKeyLength,
   } = library;
 
-  let matched: Emoji[] = MEMO_EMPTY_ARRAY;
+  let matched: Emoji[] = [];
+
+  if (filter.length > maxKeyLength) {
+    return MEMO_EMPTY_ARRAY;
+  }
 
   const matchedKeywords = keywords.filter((keyword) => keyword.startsWith(filter)).sort();
   matched = matched.concat(Object.values(pickTruthy(byKeyword!, matchedKeywords)).flat());
@@ -249,5 +260,9 @@ function searchInLibrary(library: Library, filter: string, limit: number) {
 
   matched = unique(matched);
 
+  if (!matched.length) {
+    return MEMO_EMPTY_ARRAY;
+  }
+
   return matched.slice(0, limit);
 }
diff --git a/src/components/middle/composer/hooks/useMentionTooltip.ts b/src/components/middle/composer/hooks/useMentionTooltip.ts
index 8e8d79368..934d20480 100644
--- a/src/components/middle/composer/hooks/useMentionTooltip.ts
+++ b/src/components/middle/composer/hooks/useMentionTooltip.ts
@@ -25,7 +25,7 @@ try {
   RE_USERNAME_SEARCH = /(^|\s)@[-_\p{L}\p{M}\p{N}]*$/gui;
 } catch (e) {
   // Support for older versions of Firefox
-  RE_USERNAME_SEARCH = /(^|\s)@[-_\d\wа-яё]*$/gi;
+  RE_USERNAME_SEARCH = /(^|\s)@[-_\d\wа-яёґєії]*$/gi;
 }
 
 export default function useMentionTooltip(
diff --git a/src/util/fastSmoothScrollHorizontal.ts b/src/util/fastSmoothScrollHorizontal.ts
index 30ae9d5db..cc818cffc 100644
--- a/src/util/fastSmoothScrollHorizontal.ts
+++ b/src/util/fastSmoothScrollHorizontal.ts
@@ -71,7 +71,7 @@ function scrollWithJs(container: HTMLElement, left: number, duration: number) {
 
     if (t >= 1) {
       container.style.scrollSnapType = '';
-      container.dataset.scrollId = undefined;
+      delete container.dataset.scrollId;
       stopById.delete(id);
       resolve();
     }
diff --git a/src/util/searchWords.ts b/src/util/searchWords.ts
index 7800f952b..f64206ed3 100644
--- a/src/util/searchWords.ts
+++ b/src/util/searchWords.ts
@@ -4,7 +4,7 @@ try {
   RE_NOT_LETTER = /[^\p{L}\p{M}]+/ui;
 } catch (e) {
   // Support for older versions of firefox
-  RE_NOT_LETTER = /[^\wа-яё]+/i;
+  RE_NOT_LETTER = /[^\wа-яёґєії]+/i;
 }
 
 export default function searchWords(haystack: string, needle: string | string[]) {