Plex sporadically not detecting movies

i was referring to using file station to go the the parent folder where your media is held. right click > properties > permissions > check the box for apply to all subfolders > applying. If you have multiple folders where media is stored that plex accesses then you couldn’t just do it at the parent level but you could do the same for each directory.

Re: logs, i would personally assume the logs will be found in the client that handles your media media processing. whether that is nzbget, couchpotatoe, medusa, radarr, etc. whoever sets the permissions of the file is where you would want to look at logs to see why it set the permissions wrong.