Yesterday I reported a bug about sliding-detail modals not closing. The problem is even simpler that I reported. Any table with a sliding modal: often (but not always) will not close when clicking the “X”, nor does the arrow display when you can’t close the X.
FWIW: I’m running Windows 11 and a Brave browser (Chromium based).
Where did you report it? I didn’t find any reports from you here that are done yesterday, so I assume that you contacted to customer support for that. If yes, then feel free to follow up in the same thread you have with the support on this case, and we will check it out