Incorrect screen resolution

Hello.I have a 16:10 monitor. The maximum screen resolution is 1920x1200. If I set the resolution in the game 1920x1200, then at the bottom and at the top there are black bars. If I install 1920x1080 then the image is stretched to full screen. Why ? That’s not right.

got some screenshots?

I can’t reproduce this in a clean new project.