To reproduce, ads with either a hunting scope, mk4 / marksman optic or some of the other optics. At various distances unobstructed and the scope will white out over a 5-10 second period. To clear, re-ads for a short period, it will then happen as soon as you ads again.
Ive found that if you have an object in view from your immediate vicinity whilst ads like a blade of grass / corner of a building/ another object you can stop the effect/bug from happening sometimes.