often (not always) after clicking 'apply' when editing playlists MC23 would freeze. the app still responds to keyboard commands but any mouse clicks are dead requiring a restart.
I also noticed when editing smart lists that some genres remain selected even though they don't exist anymore.
Example: genre=pop rock/aussie (after removing 'aussie' from all albums affected leaving only 'pop rock' the genre 'pop rock/aussie' remains in the smart list editor and is selected. a search in all files 'genre=[pop rock/aussie]' returns a negative result as it should because there is none.
update: after deselecting 'pop rock/aussie' in the smart list editor the genre is gone and not available more as a choice.
meaning, when changing genre names they don't automatically disappear in the smart list editor if they are selected. I think they should.