I don't really have any issues as such. Everything runs fine. I got the Note 20 a few months ago. I get the carrier upgrades so I'm not sure if/when it went to Android 11 or if they were just updates. This is the only app I have on my phone that doesn't run at all.
If you still haven't find the solution, you should probably try this.
Check if there is a certain privacy setting on your phone that is preventing the app from loading, sometimes, things like that can affect it.
Also, if your uninstall the app to reinstall, clear and delete the previous installation package before installing the new. Previous one can keep messing with the new.
If you are using a VPN, it could also be the cause. Shut it down or use the same IP you used when it worked days ago.
If nothing seems to work, chat up Electrum support team or better still use the desktop version. It will save you the stress.