PMS in Linux Docker Container Stops Responding After Some Time

Plex Media Server Desktops & Laptops
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Server Version#: 1.40.2.8395

I’ve been running Plex Media Server in a Docker container for some time now.
Docker image = lscr.io/linuxserver/plex:latest
This is running on an Ubuntu server.
I have a HDHomerun Tuner on my network that Plex uses for Live TV viewing/recording (over ethernet, not connected to the server).

It has been fine for months, but in the past few weeks the PMS server seems to stop responding. I can’t get to the web interface, so I can’t see what it’s doing. The Docker container logs don’t seem to show much.
As an example this morning it wasn’t responding after being up for about 24 hours. So it looks to have started at 07:00 on 14th May, and then in Docker logs I can see the following message
15/05/2024 06:58:24 Connection to 176.58.109.167 closed by remote host.
I didn’t check until 10:44 when I restarted the Docker container.
This sounds like some sort of scheduled task is causing it to stop responding?

I’ve already used the PlexDBRepair script to check and clean the database. It didn’t find any issues though.

I’ve attached the logs.

Can anyone help me diagnose the issue?
Thanks in advance
Plex Media Server Logs_2024-05-15_09-44-57.zip (3.5 MB)

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It’s stopped responding again today.
I can get into the container which is still running OK, and see Plex Media Server process is running, but I can’t spot any reason for it not responding in the logs.

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