I’m not sure who to point fingers at, but Plex and/or unRaid need to get together if necessary, and fix this.
One thing I had noticed was enabling the creation of preview thumbnails, caused it to crash almost immediately, and thought that may be the problem. Not so. My latest corruption was at 16:07 this afternoon, with preview thumbnails disabled, though it had been running almost 24 hours.
I removed plex from docker, deleted the plex folder from appdata, and rolled back from unRaid 6.7.0 to 6.6.7. Reinstalled plex (with preview thumbnails enabled), and it’s been running error free since about 17:00, about 4 1/2 hours. That’s longer than it has ever run with the thumbnails enabled, since I started getting the database corruptions.
UPDATE
As of today, it’s been six days since I went back to unRaid 6.6.7, using the latest linuxserver.io Plex container and I haven’t had a single problem!.