Your aim is shaking because your character is cold.

Your temp is light blue, that makes your gun shake

it seems more like a bug than an actual feature of the game, what to expect of this company, all they do is with their ass

Feature :)

However this could be improved, and synced with the audio shaking

Your character is cold you idiot. lmao . the game does that to your aim so that when youre cold your character shakes. as others have said

No, its not a bug. how many hours do you have