Thanks a lot:
But:
Hmmm … not good.
So my next question would then be, if I get back to the exact state of the system when I had backuped with these commands:
adb backup -shared -f backup-shared.ab
adb backup -noshared -all -apk -system -f backup-noshared-all-apk-system.ab
I had done that while I was still on Android 9, shortly before Android 10.
If I downgrade and then restore from that backup-shared.ab
archive … will everything be back as before, or will I loose anything?
Thanks.
Question now again is - how quickly will there be a fix … because … workaround found: