A specific resolution 1920x1080. Also my native display is 1920x1080.
The game view is meant to be a preview of what the game actually looks like. It is not typical to have it be the same size as your full screen.
My recommendation is you set it to a fixed aspect ratio instead of a specific pixel size.
Otherwise, yeah, you're going to struggle with it since you're doing things differently than people usually use it. Even if it is a bug, that makes it a low priority and it is unlikely to get fixed if you're a rare use case.