I'm having the same issues with Light/Dark settings, inability to change any metadata using the “i” button for anything other than the first track, and all of the other problematic new issues that have been introduced with 3.35, and wish to high-heaven that I’d never updated from 3.34
I'm running IPadOS 14.4 on a 2018 iPad Pro.
....in addition, even though I’ve run hard-resets on the iPad multiple times, reinstalled the app multiple times, reset the server connections, etc., I'm experiencing frequent application crashes when I open the app (at least half the time the app crashes and restarts from scratch) which do not appear connected to any particular setting, status, or function being used.
This is very frustrating, and I sincerely hope that fixes are underway for these issues. Sadly, the app has gone from one of my most favoured apps to a necessary evil that frustrates me every time I try to use it, for all of the issues enumerated above and in this thread.