diff --git a/src/components/sidebarLeft/index.ts b/src/components/sidebarLeft/index.ts
index f787bdffb..402d83b45 100644
--- a/src/components/sidebarLeft/index.ts
+++ b/src/components/sidebarLeft/index.ts
@@ -503,6 +503,8 @@ export class AppSidebarLeft extends SidebarSlider {
         const isCollapsed = !this.hasTabsInNavigation() && !this.isSearchActive && width < MIN_SIDEBAR_WIDTH * 0.65;
         this.sidebarEl.classList.toggle('is-collapsed', isCollapsed);
 
+        appImManager.adjustChatPatternBackground();
+
         throttledSetToStorage(isCollapsed ? 0 : clampedWidth);
       },
       onReset: () => {
diff --git a/src/lib/appManagers/appImManager.ts b/src/lib/appManagers/appImManager.ts
index d0879f87d..0256cc969 100644
--- a/src/lib/appManagers/appImManager.ts
+++ b/src/lib/appManagers/appImManager.ts
@@ -312,15 +312,13 @@ export class AppImManager extends EventListenerBase<{
 
     mediaSizes.addEventListener('resize', () => {
       // const perf = performance.now();
-      const rect = this.chatsContainer.getBoundingClientRect();
-      ChatBackgroundPatternRenderer.resizeInstances(rect.width, rect.height).then(() => {
-        // this.log.warn('resize bg time:', performance.now() - perf);
-        // for(const chat of this.chats) {
-        //   if(chat.renderDarkPattern) {
-        //     chat.renderDarkPattern();
-        //   }
-        // }
-      });
+      this.adjustChatPatternBackground();
+      // this.log.warn('resize bg time:', performance.now() - perf);
+      // for(const chat of this.chats) {
+      //   if(chat.renderDarkPattern) {
+      //     chat.renderDarkPattern();
+      //   }
+      // }
     });
 
     const onPeerChanging = (chat: Chat) => {
@@ -691,6 +689,11 @@ export class AppImManager extends EventListenerBase<{
     // PopupElement.createPopup(PopupBoostsViaGifts, -5000866300);
   }
 
+  public adjustChatPatternBackground() {
+    const rect = this.chatsContainer.getBoundingClientRect();
+    ChatBackgroundPatternRenderer.resizeInstances(rect.width, rect.height);
+  }
+
   private checkForShare() {
     const share = apiManagerProxy.share;
     if(share) {