Paragraph gets duplicated when trying to erase content with Grammarly enabled

(i)This issue has been observed on XWiki instances since the 12.x cycle by users using Mac, Chrome and the Grammarly extension.

(i)The issue is usually reproduced when a page remains in edit mode for a long time and when a table is present. However, I was not able to pinpoint the exact element that will certainly trigger the bug. 

(i)I was not able to reproduce this issue alone on the ck editor 4 https://ckeditor.com/docs/ckeditor4/latest/examples/standardpreset.html.  

Method to reproduce the bug: 

1. Use Chrome or Firefox
2. Install Grammarly extensions
3. Open an XWiki 12.x + instance
4. Create a new page and edit it in wiki mode
5. In Wiki mode paste this content https://up1.xwikisas.com/#PVa0mCGtAl7yDn3R2imO_A 
6. Select a word in the last paragraph, erase it, then hit backspace a few more times. After about 5 to 10 backspaces you should trigger the bug.

Result: The first part of the paragraph until the spot where you started erasing gets duplicated. 

Screen recording: https://up1.xwikisas.com/#HkT7p5idt2dlqEIjy61qbQ 

When reproducing the bug on the XWikiSAS intranet I got the following errors in the browser console:

Grammarly-check.js:2 Uncaught TypeError: Cannot read properties of null (reading 'dataset') at so (Grammarly-check.js:2:141788) at oo.updateState (Grammarly-check.js:2:143077) at t._next (Grammarly-check.js:2:144044) at t.__tryOrUnsub (Grammarly-check.js:2:32009) at t.next (Grammarly-check.js:2:31174) at t._next (Grammarly-check.js:2:30271) at t.next (Grammarly-check.js:2:29942) at t._tryResultSelector (Grammarly-check.js:2:51351) at t.notifyNext (Grammarly-check.js:2:51141) at t._next (Grammarly-check.js:2:48263)