Plex is shutting down with signal 15

Hi,

For a few weeks now every night Plex crashes/shuts down so i decided to check the log (see attached) and i found a Shutting down with signal 15. However i can not find why it is doing this.
Is there someone that can help me, because this is pretty frustrating.

Running Ubuntu 16.04

Is your machine rebooting? Signal 15 is a commanded shutdown. The same signal comes from systemctl stop plexmediaserver or service plexmediaserver stop

No the system keeps running, no reboots.

Full log files please?

Same issue, also with Ubuntu

here are my full logs with Debug
Plex Media Server Logs_2019-08-20_14-07-41.zip (11.5 MB)

Confirmed. Something on your system is telling the service (systemctl) to command a Plex shutdown.

Aug 19, 2019 12:07:14.279 [0x7f896773d700] DEBUG - Shutting down with signal 15 (Terminated)
Aug 19, 2019 12:07:14.279 [0x7f896773d700] DEBUG - Ordered to stop server.
Aug 19, 2019 12:07:14.279 [0x7f8971d2e740] DEBUG - Stopping server...
Aug 19, 2019 12:07:14.279 [0x7f8971d2e740] DEBUG - HttpServer: Stopping server.
Aug 19, 2019 12:07:14.280 [0x7f891bfff700] DEBUG - TranscodeJobManager: [Running] onServerShutdown
Aug 19, 2019 12:07:14.280 [0x7f891bfff700] DEBUG - TranscodeJobManager: [Running] -> [Shutdown]
Aug 19, 2019 12:07:14.280 [0x7f896773d700] WARN - Timed out waiting for server to finish.
Aug 19, 2019 12:07:14.280 [0x7f891bfff700] DEBUG - MetadataItemClusterRequestHandler: a shutdown event has been received
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - Server stopped.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - Killing plug-ins.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - [com.plexapp.plugins.trakttv] Killing.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - [com.plexapp.agents.fanarttv] Killing.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - [com.plexapp.agents.localmedia] Killing.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - [com.plexapp.agents.plexthememusic] Killing.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - [com.plexapp.system] Killing.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - [com.plexapp.agents.themoviedb] Killing.
Aug 19, 2019 12:07:14.281 [0x7f8971d2e740] DEBUG - [com.plexapp.agents.thetvdb] Killing.
Aug 19, 2019 12:07:14.295 [0x7f896773d700] WARN - JobManager: Could not find job for handle 46633
Aug 19, 2019 12:07:14.295 [0x7f8971d2e740] DEBUG - Waiting for Plex Tuner Service to exit.
Aug 19, 2019 12:07:14.298 [0x7f896773d700] WARN - JobManager: Could not find job for handle 46695
Aug 19, 2019 12:07:14.299 [0x7f896773d700] WARN - JobManager: Could not find job for handle 46571
Aug 19, 2019 12:07:14.299 [0x7f896773d700] WARN - JobManager: Could not find job for handle 46605
Aug 19, 2019 12:07:14.304 [0x7f896773d700] WARN - JobManager: Could not find job for handle 46656
Aug 19, 2019 12:07:14.308 [0x7f896773d700] WARN - JobManager: Could not find job for handle 218
Aug 19, 2019 12:07:14.332 [0x7f896773d700] WARN - JobManager: Could not find job for handle 307
Aug 19, 2019 12:07:14.385 [0x7f896773d700] DEBUG - Jobs: '/usr/lib/plexmediaserver/Plex Tuner Service' exit code for process 269 is 0 (success)
Aug 19, 2019 12:07:14.385 [0x7f8948ff9700] DEBUG - Plex Tuner Service exited.
Aug 19, 2019 12:07:14.385 [0x7f8971d2e740] DEBUG - Killing job.
Aug 19, 2019 12:07:14.386 [0x7f8971d2e740] DEBUG - Signalling job ID 46547 with 9
Aug 19, 2019 12:07:14.386 [0x7f8971d2e740] DEBUG - Database: Shutting down.```

Today it happens again, 12am… but i can find anything in my system told plex to shut down… this issue just happens with PMS 1.16.5.1488. bevor it dont happens

What can i do to fix it?