Thank you for the logs. A crash happened at 17:41:52 on 19th May. The server for some reason did not stop and continued to attempt to run and ended up with a deadlock at 17:54:20 with no requests being processed and was restarted at 18:11
It appears to be similar crash with what has been reported by other users on this forum topic Ubuntu 18.04.2 LTS - Plex Server Crashes - Double free or corruption (!prev)
I will add your diagnostics to what has already been referred to the development team
