TYPO3 Core

Happens every time I do this specific routine, yet I don't yet know which step(s) are essential to reproduce.

I am editing a group of content elements. All are text. Specifically I'm editing 4 entire text elements on a single page through the list view (Clipboard 1 enabled).

In the first I edit the text w/ the HTMLArea editor turned on.
The next two HTMLArea is disabled. I paste text in to both content elements. On the first I re-enable HTMLArea to verify.
On the 4th, I modify a link (right click , Modify Link). Next I click the Access tab to update access permissions. This is where it starts reporting the error. Just about (if not) everything I click results in the error. Fortunately the alert appears after the action I intended takes place.

Not sure what else to say yet.

(issue imported from #M8631)