Audio Description does not appear on AppleTV for some items

We have two Apple TV 2 models and two Apple TV 3 models. While we did not have a problem turning on Audio Description in the Prime Video app, we are now unable to do so for some titles. I can play on an iPad and airplay with the Audio Description, so I know the titles have it, and the Apple TV is already set to use Audio Description. This is a relatively new problem - it started sometime over the last year - we did not have this problem previously.

We have an Apple TV 4, but ironically it is less accessible than the earlier models. All is well if you want to talk to the device, but relying on Voiceover - it is difficult to navigate and not all of the apps are fully accessible.

Any thoughts?