Metadata only works after a restart

My Plex Server has always worked without issues, but lately it seems that it doesn’t want to download Metadata unless I restart Plex Server.

Strangely it shows the “unmatch” menu item like it is matched, but I get no movie poster or other metadata, un-matching or manually fixing the match doesn’t help, but after a quick ./plex.sh restart it’s all good again… until tomorrow.

Any ideas on where I should look or what might be causing this?