diff --git a/src/components/left/main/LeftMainHeader.tsx b/src/components/left/main/LeftMainHeader.tsx
index 97eb792d9..333922bd1 100644
--- a/src/components/left/main/LeftMainHeader.tsx
+++ b/src/components/left/main/LeftMainHeader.tsx
@@ -14,6 +14,7 @@ import buildClassName from '../../../util/buildClassName';
 import { formatDateToString } from '../../../util/dateFormat';
 import switchTheme from '../../../util/switchTheme';
 import { setPermanentWebVersion } from '../../../util/permanentWebVersion';
+import { clearWebsync } from '../../../util/websync';
 import { selectTheme } from '../../../modules/selectors';
 import { isChatArchived } from '../../../modules/helpers';
 import useLang from '../../../hooks/useLang';
@@ -159,6 +160,7 @@ const LeftMainHeader: FC<OwnProps & StateProps> = ({
 
   const handleSwitchToWebK = () => {
     setPermanentWebVersion('K');
+    clearWebsync();
     disableHistoryBack();
   };
 
diff --git a/src/util/websync.ts b/src/util/websync.ts
index fb2eadebc..0f5747268 100644
--- a/src/util/websync.ts
+++ b/src/util/websync.ts
@@ -84,3 +84,7 @@ export function startWebsync() {
     forceWebsync(authed);
   }, Math.max(0, timeout * 1000));
 }
+
+export function clearWebsync() {
+  localStorage.removeItem(WEBSYNC_KEY);
+}