I've noticed this issue with one weapon and sights so far, but maybe it happens with other gear as well:
Map: Blackwell fields
Weapon: LMR27 (one of the DMRs)
Sight: Scope 3.00X
Issue: repeatedly, my sights are blurred when aiming down-sights from the hip or intermittently while aiming down-sights. It feels as if the blurring effect that was applied at the beginning of the animation when you go ADS is persisting and affecting the entire field of view. It fixes right away if I stop ADS (but often happens again when I do it again) or after a somewhat random period of ADS.