NobodyInParticular

I installed Leopard7's Music Player and got it running without a hitch after granting it access to my media files. Then, mysteriously, Poweramp started working without my changing anything else. I uninstalled Music Player and Poweramp still works fine.

Update. I found the following information in the Poweramp FAQ: All of these apps exist and are enabled except com.google android.permissioncontroller, which GrapheneOS replaces with com.android.permissioncontroller. When started, Poweramp sometimes displays its UI for an instant, then immediately closes. Has anyone else running GrapheneOS got Poweramp running?

OS: GrapheneOS (Android 11) Phone: Pixel 5a Installed Poweramp, gave it access to Files & Media, network and sensors. Have Google Play Store running in sandbox, but with no permissions. When I try to open Poweramp, it doesn't open. What else must I do to run it?