When i press and hold "eye focus", then hold W and press LSHIFT to run, (eye forcus reseting) (in video)
same with hold "eye focus", then hold LSHIFT and hit any move button "W, S, D, A"
another way hold "eye focus" and try switching 1pp and 3pp with V.

https://www.youtube.com/watch?v=5_6iz-1mIMs