Xbox app does not run in fullscreen :(

Hi there, I have a Razer Phone 2 and the latest Xbox app installed. When I try to remote play from my Series X console to my RP2, the notification bar does not hide and the navigation bar creates black bars around the streaming area (even though it auto-hides). This only happens specifically with the Xbox app, the other streaming apps (e.g. Steam Link, Moonlight, PS4 remote play) work as they should be, covering the screen from edge to edge. I have tried re-installing the Xbox app, installing older versions, resetting the phone and I even tried force-hiding the bars with third-party Android apps, nothing worked. Even the MS support couldn't find me a solution. Any ideas? Thanks for any help.