This way I can't play forge and my skin does not load.
(I have two MC-Launcher background processes in the Task Manager which I have to close)
So if you open Minecraft on the launcher, do you open 2x the launcher? Did you open it several times? How long has this been possible? Did you have that before too? What did you do when it first happened?
It may be that I have always accidentally opened the launcher 2x, so have a mouse with double-click. Maybe I always pressed that twice.
Since about 3 d.
I did not have it before.
I did not really do anything relevant. Even if, deleted / updated MC, the .minecraft folder, Java, video driver.
Less use the double-click button.
Unfortunately, I can't help you now. Hope you find a solution