Why does the Disc + Digital in Spotlight Collection appear and disappear on Roku?

You can see and buy D+D when looking at eligible titles, but the "collection" of D+D is mostly never there on Roku, but sometimes it is.

This is compared to the web interface where Showcases has a Shop DVDS & Blu-Ray "collection"

It would be nice if you didn't have to go to the website for this one thing.