Media Center Ver. 22.0.15
In ‘Theater View’ when using a keyboard or remote. (I normally use a remote, but noticed this behavior on the keyboard too)
In ‘Playing Now’ view, navigate to ‘Player’ on the secondary roller. Press ‘Enter’ to access the ‘Player’ menu. From here navigation becomes unreliable. Pressing 'Cancel' to leave the menu fails. Using the left and right arrow keys allows the user to escape the menu even though the menu remains visible. It’s possible to navigate out of the view, but this isn’t working as it should.