Issue with Dark Mode in Category popout window (OSX10.15.6, GS 8.3.5)

1st screenshot regular appearance when popping out

2nd screenshot after typing in search field
Screenshot 2021-04-03 at 21.13.53

Screenshot 2021-04-03 at 21.14.03

Does the problem happen if you turn off Dark Mode?

No, it is specific to dark mode.

This issue should be fixed in the latest beta: