So, when I'm in third person and my gun is lowered if I aim the gun points up for a second while the crosshair stays still, then it goes back normal.
It seems to get worse after a few minutes, at first the animation seems normal (the gun goes more and more upwards before going down)..

It's actually really annoying after a while and I'm hoping someone knows about this, thanks in advance btw.

some screenshots at imgur.com/a/Xd1OT