1080p not displaying correctly but 720p is perfect

Hi,

after updating to the latest beta i had to change the resolution down to 1280x720p cause i only got the top left side in 1920x1080p
my tv is a 4k so the problem should not be there i also tried another tv that has a max 1920×1080 with the same result.

in windowed mode it runs 1920×1080 without any problems but zoomes in full screen.

anyone else got this problem ?