I believe this is a regression caused by the following commit that escapes the escaping:

Date: Tue Nov 7 17:31:10 2023 +0100
commit 73bcd6b4685d8f294602faecf52bbc4b0c6b9da7

This probably needs to be fixed in both XWiki 16.X and XWiki 15.X

(ping Charpentier Lucas I'm taking the liberty to assign this ticket to you so you don't miss it, I know this is not what we usually do, feel free to remove the assignment if inappropriate)