Apparently on any devices I have with the “new” UI (confirmed on iPhone and iPad, both beta and release), at least one movie I have doesn’t appear (“Frozen: A Musical Spectacular”). It does show up if you search for it, and it also appears as expected on the web interface and on Apple TV running the “old” UI.
I’m not sure if any other movies are missing, I have far too many to go through them all, this is just the first I’ve noticed.
Server Version#: 1.41.8.9834
Player Version#: Multiple
It’s been in my library a long time, so it doesn’t appear in Discovery at this point. It shows fine in searches, and in the library of devices with the old UI. The only place I know for sure it’s missing is the library view of devices with the new UI.