Xbox app does not run fullscreen on my devices

Hi there,

I have a Razer Phone 2 (running Android 9) and a hacked Nintendo Switch (running LineageOS 17.1). Both devices have the latest Xbox app installed and
both devices have a 16:9 ratio display. When I try to remote play from my Series X console to my devices, the notification bar does not hide and the navigation bar creates black bars around the streaming area (even though it 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?

:)