Today I updated my moto g 5G Plus to Android 11. Poweramp gave no sign of life ... it showed the list of files but without any cover or sound.
I googled "Poweramp does not work android 11" and it showed me this page (I have already subscribed to the forum a long time ago ...) which has solved the problem quickly: disable file inheritance mode and recover the entire library ( 5621 files) ... everything fine even after rebooting the phone ...
My (full) version is build-905-arm64-play (905004-96b6d050)
Thanks to maxmp and andrewilley for their explanations .... !!! 🙂