They are different platforms that come with their own constraints/dependencies. Sometimes users don’t have a native Plex app but use a DLNA client instead.
Given yours is a Sony Bravia, that’s probably an Android TV model running the version of Plex downloaded from Google‘s Play Store?
Can you verify which version/release of the app you have installed?
If you’re accessing the same server with the same account, you shouldn’t get this kind of discrepancy and I haven’t seen similar reports.
In each case, the movie was sitting right next to the empty collection. It took me 15 minutes to clean this up but hours to troubleshoot. Behavior like this shouldn’t be happening to people who don’t change things. I just add movie files to a folder and Plex is supposed to do the rest. I never set “automatically add to collection” explicitly but I have just now raised the minimum from 1 to 2. I never even knew about that setting.
Strange. Had you ever messed with collections before, manually setting the collection tag on any of your movies? Doing so can lock the collection tag field, preventing the movie from being in one of Plex’s automatic collections. I am not sure why any of these collections would all be at the top of the movie list however…
Good thing you found the minimum collection threshold option. 1 is VERY bad, because it can create single-movie collections which I find very ugly. And a movie that has had a sequel announced could magically find itself added to a newly created collection years before the sequel even comes out.