Since the update 1.16.200 minecraft windowed mode doesn't works anymore on my computer.

I have my laptop conected with a second screen and when I play it in windowed mode on the second screen minecraft always makes both screen completely black and after this it returns to the first loding screen. 

This only happens if the second screen is conected and if he is not, my computer has massiv framedorps ever few seconds.

All of this doesn't happens if I play on fullscreen.

I have a GeForce GTX 1070 graphics card.