Thanks for that. Just following up that this workaround did stop the "slow forced rebuild after an update" but at the cost of having to rescan your library manually for any changes or music added. This capability used to work fine before for me and other users in this thread, so I would imagine there was some sort of change at the OS level that Poweramp is currently not handling properly which prevents the Auto Update feature from working as expected.
What can I do to help move this from a workaround to a solution that keeps Auto Update working?