Fix opening pinned messages

.env

@@ -1,5 +1,5 @@
 API_ID=1025907
 API_HASH=452b0359b988148995f22ff0f4229750
 VERSION=0.9.1
-VERSION_FULL=0.9.1 (18)
-BUILD=18
+VERSION_FULL=0.9.1 (19)
+BUILD=19

src/components/chat/bubbles.ts

@@ -1572,7 +1572,7 @@ export default class ChatBubbles {
       }
     }
 
-    const isChangingHeight = this.chat.input.messageInput.classList.contains('is-changing-height') || this.chat.container.classList.contains('is-toggling-helper');
+    const isChangingHeight = (this.chat.input.messageInput && this.chat.input.messageInput.classList.contains('is-changing-height')) || this.chat.container.classList.contains('is-toggling-helper');
     return this.scrollable.scrollIntoViewNew(
       element, 
       position,