Steps to reproduce the issue

Edit an article using Joomla 4 FRONTEND as super admin
Go to the Publishing tab
Click X to remove the category
Click Save

Expected result

"One of the options must be selected" should be all on one line.

Actual result

Interestingly when trying to select the text to copy into this issue I then got:

and on blur I then got

System information (as much as possible)

Safari 14.0.1 on Mac big sur developer beta 9

Additional comments