I just received a friend request alert whilst playing a asynch game.
I accepted it via the top left ‘friends’ menu.
When I came out of the game I also had a friend request pop up at the bottom right of the screen (the same place as where match alerts appear)
I checked profile into to see who the person was that had sent the request.
At this point I couldn’t then click anywhere else on the screen, so I closed the friend request popup via the X.
I still couldn’t click anywhere in game, and had to re-launch.