workaround for scrollIntoView bug ???

app/javascript/mastodon/features/status/index.js

@@ -252,10 +252,12 @@ export default class Status extends ImmutablePureComponent {
     if (status && ancestorsIds && ancestorsIds.size > 0) {
       const element = this.node.querySelectorAll('.focusable')[ancestorsIds.size - 1];
 
+      if (element) {
         element.scrollIntoView(true);
         this._scrolledIntoView = true;
       }
     }
+  }
 
   render () {
     let ancestors, descendants;