Same here in Geordieland on Now stick (not visible on other devices).
Only have Sports - so cannot check other media. When I hit return on control a fuzzy blue/black box appears momentarily in same position just before Home page appears.
Spoiling enjoyment of 'live' match.
Tech help - PLEASE !!
10 minutes so far and no sign of the grey shadow box in the top corner whilst watching Sky Sports Main Event.
It looks to me it's another glitch and bug with the NowTV new look home screen layout on NowTV branded devices 😠.