fix: clear touch identifier on comment text area pointerdown (#9172)

core/bubbles/textinput_bubble.ts

@@ -176,6 +176,7 @@ export class TextInputBubble extends Bubble {
     // Don't let the pointerdown event get to the workspace.
     browserEvents.conditionalBind(textArea, 'pointerdown', this, (e: Event) => {
       e.stopPropagation();
+      touch.clearTouchIdentifier();
     });
 
     browserEvents.conditionalBind(textArea, 'change', this, this.onTextChange);