I found the cause of the problem, I had a Windows setting activated:
Settings > Gaming > Game Mode > Graphics > Windowed Game Optimizations - Reduce latency and use advanced features in supported games using the flip presentation model (was active).
Suggestion: I imagine that it is not and should not be possible to simply turn off this user option, but perhaps there could be a variable that identifies whether this option is turned on or not (and nvidia's too since it is the same idea), so a " warning" could be added to the game.