This is a feature in "Roku Channel" and viewers can save a Serie in a special list to find it faster.
I noticed this feature has been added to my DP too.
Do you guys know anything about it? Like always, there is nothing in documentation.
I stumbled upon it accidentally. After adding a show to your save list (hit asterisks while on a show and save list will be a choice),
go to the roku remote app and look for the save list. I clicked on on if the shows and it started playing on my tv, when I exited the show, the save lust was there in the roku app on the tv.