[MC-175603] I can't use the keyboard and mouse at the same time. I can't walk and move the camera at the same time

I installed the game and went to test it, there was this little problem that interferes with the gameplay.

Linked issues

What kind of mouse do you use? If you use another mouse, does the issue still persist or does it go away?

Some keyboards with built-in touchpad will do this. (And not just MC. Also a problem with other applications)