Alarm clock icon on Roon iPad icon

When I picked up my iPad this morning, the Roon symbol was in the tool bar as recently used, and there was a little alarm clock icon overlaying it. (I didn’t think to take a screen capture, and now it’s gone.) Looked like something iOS had put there.

Does anybody know what this is?

Note: the most recent zone was the big speakers, not the iPad itself.

I think this is iOS saying “you often use this app at this particular time of day, so we would like to suggest it for you in the tool bar.”