I've got a Primergy TX100 s3, 10tb parity disk and a 10tb data disk, and last night i added a 500gb cache disk. I've done no special config for the dockers, only linked them to a media share, else everything default.
First corruption was sometime during the night after first run on linuxserver image, second one was also on same image, but i turned off automatic update when adding media, still corrupted database image. Third time i moved to plexinc image and it was online for almost 2 days, but resulting in corruption a few hours ago. Trying to fix the corruption by tips given by plexinc doesn't solve anything, and causes the docker not to be able to run at all.
After first corruption i saved plex logs via tautulli and they are filled with lines such as this, other corruptions have had other statements and lines:
tower-diagnostics-20190519-1139.zip