All my my media is on an external drive attached to my MBP. I watch the movies and TV shows on the Apple TV 4k in the Computers app.
Prior to Catalina, things were fine (I had the Apple TV 3rd then). But with Catalina and the 4k model, TV episodes are marked as partly played on the Mac even though I viewed the complete episode. This means the next time I watch the TV show, the ATV does not automatically land on the next unwatched episode. If I watch on the Mac, it will then be properly marked as played.
Any thoughts on this? Am pretty sure settings are correct on Mac and ATV but maybe I missed something.