Plex Server constantly freezes after update from Ubuntu 16.04 to 18.04

further to what @ChuckPa said, we would also need the connections list at the time of the deadlock.

See Diagnostics for Deadlocks on NAS/Linux in this post for details of what is needed

  • connections list and noting down the time, a process dump invoked via kill -segv <pid> and the logs taken after resarting the server and the crash report for the process dump uploaded