This software is rotting, was trying to edit frames of a gif this week and the previews are just broken in the timeline on Mac, literally had to boot up my PC, sign in which required restarting photoshop 3 times it just straight up closed itself each part of the process (once to sign out, once to sign in and once to actually use it signed in). Luckily the timeline still works on Windows but completely broken on MacOS so if you're Mac only you can no longer use Photoshop to remove frames from a gif and who knows what other software you should use instead for that thanks to Photoshop monoculture.