On my Lumia 950 I’m finding that whenever I try to press any of the functions on the playlist popup (Shuffle, Delete, ...) the entire popup is dismissed and no action is taken- it’s as if I’ve tapped outside of the popup (or on the background). I am still able to initiate playback of the playlist by tapping on one of the tracks listed.
Been having a play with Continuum and can confirm that the issue also persists in the continuum interface. Also worth noting that the way the popup scales (or doesn’t) seems awfully strange- the toolbar portion is expanded across the bottom edge of the screen while the list itself is still in a small box in the middle of the screen. Probably quirks of the platform.