sahuff2

I think I figured my problem, finally.  I will post my solution in case someone else has similar issues. 
 
I KNOW I setup the Plex container to use the Intel iGPU when I installed it (100% did it because it intially worked without issues for weeks), but somehow the settings were cleared in the advanced docker settings and it was doing full CPU transcoding, which was throwing errors in the log with the x264 encoder (new errors that weren't in the original log I posted). I was also getting Plex Transcoder segfault log messages.  Thinking that it might've been bogging down the CPU, I began by limiting the CPU cores in the docker setting to four cores and it stopped locking up.  But then I discovered the iGPU wasn't being used at all for transcoding!!   I followed this guide and re-enabled the iGPU and it seems to have fixed my problem.
 
Thanks for looking at my log/diagnostic and helping me.  I'm glad it ended up being something that I inadvertently caused and my hardware is okay.