This is a preliminary report about having ADS shots, fire higher than expected.
Was in Radunin on official PC. Using a USG-45 with a 4x ATOG and attached silencer. Shooting at Zeds 20-35m away with reticle trained at center head connects while standing. Crouching with the same scenario causes shot to pass over targets head. Lowering reticle to chest area results in head shot.
Might have been a fluke as I can only say I have experienced this once, but I don't crouch often while shooting zeds. Will test further and report in this ticket.