All of a sudden low resolution

[Tumbler]

I was playing on the atag server and after having crashed into a part of France, I wanted to respawn another airplane. When I got into the plane the resolution all of a sudden was very low. I've tried, restarting, rebooting, single and multiplayer mission, triple checked the video settings, NVidia settings but to game refuses to run in 1080p.

any idea what goes wrong here?
shot_20180308_232417.bmp

EDIT: ok, selecting the already selected 1080 resolution in the option and clicking ok and thus restarting, fixed it