I hope this is the correct place to post this.
I’ve noticed that some podcasts episodes I’ve already played change their status to “not played” after a while, I think specially after a server reboot (because of updates).
It seems to happen more with manually imported podcasts, but some like “Conan O’brien needs a friend”, which I didn’t import manually, has the same issue.
It happens independently from the client I’m using so I suspect it’s a agent or PMS server issue.
It would be great and maybe the perfect solution (at least to me) to play my podcasts 
My Plex Media Server is inside a docker on my unRAID server. Version 1.19.1.2701