Getting 'Failed to play - Storage Unmounted' after latest update

After the latest update (Build 828), after a while, when trying to play my music in folders, I get an error: 'Failed to play - storage unmounted'. At first I thought my SD card had gone bad, until I went to play my music using another app I have, and my music played just fine. I've done a re-scan, shut my device off (Motorola Moto G5+), even removed and re-installed the SD card, all to no avail. Then I realized I was having the same problem on another device, but only in Poweramp with the same u

You can give the permission back via long pressing Poweramp icon, ⓘ (Info) / Permissions / Storage / Allow ... (please ensure Remove permission if app isn't used is DISABLED on the same screen, or the permission will be taken away randomly by system). Alternatively you can disable "File Access Legacy Mode", then in Music Folders give the new permission and re-choose folders. This is recommended way, but requires music folders reconfiguration. @Jon Your Poweramp is in "File Acc