PlexMediaServer-1.21.1.3830-6c22540d5-x86_64 killing PLEX on my SYNO

As I noted in the other issue tracking this one, deleting/re-adding users didn’t work for me (just created a massive headache to get the invites all re-accepted), and I eventually downgraded to fix the problem.

That’s obviously not tenable for security reasons, so it’d be great to get a confirmation of the real problem and an official fix.