settings not stored

[ronso0]

even though I've disabled Torchie on the lock screen there's sometimes a Torchie slider bar popping up at the top edge of the screen when I want to adjust the ringtone volume with the Vol buttons

Sony xperia x compact
android 8 (stock Sony, up to date)

[ronso0]

even when I expand the volume panel on the lock screen I can't adjust the volume with buttons.
again, this happens irregularly. most of the time it just works

[ronso0]

it seems the described issue popped up because Torchie settings were not stored.
Thus I saw the Torchie slider bar (with a cast icon at the left) that inhibited Vol change.

Settings now persist with official 3.2 from FDroid