I had a breakthrough on the memory spikes and subsequent crashes when looking at the last set of diagnostics from @spdelope - I would like to get zipped download of your Plex Media Server database to see if the same underlying issue exists there as well
Please select Settings / Server / Troubleshooting / Download Database and send me link by private message to where you have uploaded the zipped database to
The periodic refresh metadata that was happening every 3 days was adding lots of trailers and I need to see if there is visibility of that - if I find that - then would like the scheduled tasks re-instated and logs captured early every morning for a number of days to see if I get evidence of the problem arising