Gray box stuck on friend's screen when trying to play with remote play

[Neo]

Whenever i try to play any game with remote play this shows up on my friend's screen when they join (tried with 2 friends) after pressing A it turns into a rectangle, and is impossible to get rid of. Hoping somebody can help me out.
My friend is able to play the game with the box (all inputs work) but the box makes it impossible to see the game
I've tried turning steam beta on and off, and turning off all background processes.
https://imgur.com/a/1JwKZjI

[D♥sh]

I have the same problem. did you fix it?

[Neo]

nope, just use parsec

[clawile]

I've also been having the same issue for a few months and can't find a solution

[LouisSuffeR]

Hello, I was the host.
I fixed the problem by uninstall and re-install the Steam client (with admin rights).
Hope it will work for you too.