Cursor lag on MixMaster

[BC5585]

Hello, I've found yet another problem. If you increase the size of the game without going into full-screen mode, there's a misalignment between the mouse position in the game and the mouse position known to the computer. This causes a lag if you move the mouse outside the game window.

For example, in this image, the mouse was in the game, you can clearly see it, and when you move it out of the game window, it appears at the red arrow.
Sometimes, when you try to move the cursor out of the game, it disappears from the game because it should have moved out of the game window, but it doesn't appear on the computer yet because the computer considers it to be still in the game window.

Thank you