My On Deck disappeared about a month ago. I reported that here: On Deck - Content Unavailable
I don’t know if that has been fixed, but maybe if you try adding the On Deck from one of your libraries to the home screen, it might return. That’s if you have an “On Deck” on the recommended tab of your libraries…
I DO have both on deck and continue watching now, so it might not be the same problem.
