Plex not picking up new content after rebuild

If I may offer this ?

Given the amount of tech support I provide,
I have had the most issues come from users running Mint.

My statement about it being unstable for PMS is based on that experience.
I do not discount that it’s fine for many other purposes.
I merely state it’s demonstrated it doesn’t hold up well to the demands of running a PMS server.

I am glad you found the problems.
Many are not as fortunate.