"Add toolbar is available" displays when adding thread replies consecutively

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, Master
• Fix Version/s: 7.1.X, Master
• Component/s: Frontend Infrastructure
• Labels:
  • 7.1-could
• Fix Priority: 3

Steps to reproduce:

1. Add Message Boards portlet to page
2. Add new thread
3. Add multiple replies to thread, consecutively, without going back to page. At least 7/8 replies
4. Go to page

Expected result: No unnecessary text display on top of the nav bar
Actual result: If you inspect page, you will see multiple elements with message that say "Add toolbar is available. Press ALT+F10 to focus.". Sometimes it displays on screen, depending on how many replies are added to the thread post. Refreshing the page will hide the messages. Though, it will be reproducible again once you add multiple replies consecutively to page.

This is the following source when I inspect the element/text:

<div class="ae-ui">
       <noscript data-reactid=".0"></noscript>
</div>

<div id="cke_1LiveRegion" class="ae-sr-only" aria-live="polite" role="status">Add toolbar is available. Press ALT+F10 to focus.</div>

Reproduced on:
Tomcat 9.0.6 + MySQL 5.7
Portal master GIT ID: 0b483417142eb12085ff09bceadb9d3e744d7e97