The TV app’s Up Next is buggy. I’ve found it won’t refresh when changes are made on other devices until the app is killed and restarted.
Also it won’t show new episodes of TV shows if the app that plays them isn’t installed. That means your Up Next list can be different on different devices depending on what apps are installed. That’s not how it used to work in iOS/tvOS 12. If the app wasn’t installed, the episode would show up and when tapped would prompt to download the app.
I also just had the Up Next completely disappear on my iPhone. The entire list just vanished until I logged out of iTunes and back in. The missing items still aren’t showing up though.
Also it won’t show new episodes of TV shows if the app that plays them isn’t installed. That means your Up Next list can be different on different devices depending on what apps are installed. That’s not how it used to work in iOS/tvOS 12. If the app wasn’t installed, the episode would show up and when tapped would prompt to download the app.
I also just had the Up Next completely disappear on my iPhone. The entire list just vanished until I logged out of iTunes and back in. The missing items still aren’t showing up though.