Fulscreen of Youtube videos canceled when i tilt the mouse

Fulscreen of Youtube videos canceled when i tilt the mouse

Hi!
I have a little problem with the Z2 (batch 3).
When i'm in fullscreen on a youtube video, if i tilt left (or up, it's difficult to say) the mouse, it got out of fullscreen.
I tried to remove all the tilt functions attributed to every profiles i got but the problem is still hare.
It also seems to do this in The Elder Scrolls Online where it close the welcome page right when i enter the game.
As it look very sensitive i think the degree of tilt must be 1.5.
Do you know what can cause this problem?