Not sure when this started but it's really annoying, when a unit is swimming and head is clearly out of the water no mater how many times I shoot at it it won't die.
I'm on land using standard weapon, AI unit just 10-20 meters away with head out of the water.
A video from 3 months ago: https://www.youtube.com/watch?v=wrp1ZjiYqAA
Impossible to kill a floating unit. The bullet tracers penetrate his head but don't inflict damage.
There's a small chance of a hit if the target swims up.
Old bug. Unit (man) in the water become invulnerable. BIS, you need to fix it finally.
I forwarded the problem to the developers. I really hope that problem will be fixed soon.