Here is my journey with general crashing issue (when doing nothing), I hope someone from Plex will actually bother to help, but sadly experience shows this is unlikely. Can’t help but feel that Plex for iPad/iOS is abandonware at this point. This is truly pathetic.
https://forums.plex.tv/t/plex-client-on-ipados-crashing-at-least-5-7-times-a-week