The game appears to have a hard time figuring out, is it fullscreen or not. I've noticed with snowrunner than not all applications will detect SR as running fullscreen, sometime not even SR it self.
Sometimes when starting SR, there's no audio on the main menu, that's until i click the window as if the game itself didn't know the game window was in focus, and needed an extra click to verify it.
Sometimes, regardless of borderless or fullscreen, radeon drivers can't detect the game is running fullscreen. And will show overlay incorrectly as if game was running windowed.
I had another example, but i forgot it.