When I play media in iOS 11 (e.g. spotify), media control doesn't recognize it and show it on my lock screen or in control center.
If I do a hard reset, the problem goes away temporarily.
I am using an iPhone 6S (64GB) and running iOS 11.0.2.
UPDATE: the problem has magically dissapeared on my device, though i'll leave the question up since I know others might have this problem.