Bmp 3 laser rangefinder off

It’s off when I select the 100mm gun and I laser range find a target with the HE shell.
Or is it just the crew, because I’m in a test drive.

Which target are you shooting?

After few tests I can confirm that 100mm on BMP-3 and BMD-4 is not shooting at aim point when shooting target ~800m+, it’s consistently shooting below point of aim.