android.process.media crashes when trying to change notification sound if the current notification sound was set by an app

[greekdoctor]

Tested on 20191122. The following bug was not present in Pie.

When trying to change the notification sound for a facebook messenger notification, android.process.media crashes. If I try to change the notification sound from within the messenger app itself instead of in the notification settings, messenger itself crashes. The crash only occurs when trying to change the notification sound when the current notification sound is set by the app itself.

I've attached two separate logcats, one where triggering the crash in messenger and one when triggering the crash in the notification settings for the system. In both logs I triggered the crash twice.

logcat_messenger.txt
logcat_mediacrash.txt

Also attached: screenshots of the buttons which trigger the crash.

From the notification settings. The crash occurs when pressing the "Lyd" - "Lyd fra app" button. "Lyd fra app" means "sound from app".

From the settings in messenger. The crash occurs when pressing the "Varsellyd" - "Messenger" button. When I try to change the ringtone there is no crash, which I suspect is because the ringtone was not set by the app but by the system.