Errors in JS console which prevent the page tabs to show their content properly sometimes

STEPS TO REPRODUCE

1. Open a fresh instance of XWiki (with Chrome or Edge, the issue reproduces also on Firefox but sometimes with no errors in browser console)
2. Create a page (e.g. Pag1)
3. Click on another page (e.g Sandbox) and observe the browser console
4. Upload an attachment to a page (e.g. Pag2)
5. Click on that page from Navigation Panel (or click on another page and then click back to the page with attachment) and observe the browser console

EXPECTED RESULTS

When accessing the pages, the Comment tab is selected and its content is displayed by default. No error are displayed in browser's console.

ACTUAL RESULTS

Sometimes, when landing on respective pages, no tab is selected and no tab content is displayed (until the page is refreshed).

The following error is displayed in browser console:

Uncaught TypeError: element.dispatchEvent is not a function
    at fireEvent_DOM (prototype.js?r=1:7141:13)
    at fire (prototype.js?r=1:7130:17)
    at HTMLDocument._methodized [as fire] (prototype.js?r=1:456:23)
    at HTMLDocument.fireContentLoadedEvent (prototype.js?r=1:7317:14)
fireEvent_DOM @ prototype.js?r=1:7141
fire @ prototype.js?r=1:7130
_methodized @ prototype.js?r=1:456
fireContentLoadedEvent @ prototype.js?r=1:7317

The issue occurs most often after creating a page and clicking on another page and could be sometimes reproduced after just opening the XWiki instance and just clicking on Sandbox from Applications Panel (without creating anything).

Also, sometimes after uploading an attachment on a page and navigating away and then returning, the following error is displayed in JS console (I found that this is a bit harder to reproduce):

Uncaught TypeError: element.attachEvent is not a function
    at observeCustomEvent (prototype.js?r=1:7023:15)
    at observe (prototype.js?r=1:7003:7)
    at HTMLDocument._methodized [as observe] (prototype.js?r=1:456:23)
    at searchSuggest.min.js?cache-version=1646063324000&h=1255116547:9:15
    at searchSuggest.min.js?cache-version=1646063324000&h=1255116547:9:55
observeCustomEvent @ prototype.js?r=1:7023
observe @ prototype.js?r=1:7003
_methodized @ prototype.js?r=1:456
(anonymous) @ searchSuggest.min.js?cache-version=1646063324000&h=1255116547:9
(anonymous) @ searchSuggest.min.js?cache-version=1646063324000&h=1255116547:9

 
What is difficult is that I couldn't find a direct pattern to reproduce these errors (I've sometimes reproduced them after lots of clicks to navigate back and fourth to other wiki pages, other times reproduced very fast) and they seem to be most visible in Chrome and Edge.

It is to be mentioned that the issue reproduces also on XWiki 14.1, but I couldn't reproduce it on XWiki 14.0.