GWX 3.0 Periscope problem, or is it?

[Luciferret]

It seems my sub wont go deep enough when going to P depth. Its type IIa and every time i try to submerge the sub atually stays at 9m leaving my conning tower partially visible on surface. Now i dont know if this counts for AI to detect it, but atleast it looks damn silly. And the second thing this affects is the periscope depth gauge in Periscope station. In vanilla i can raise the whole periscope to the full length like in the picture near the scale which shows the actual depth but in GWX it doesnt go that far. Like the red arrow showing periscope height is way too low.

Few pics to clarify my problem.

edit.
It also looks like when clicking new depth its always few meters off. Like when i try to put 15 meters manually it forces the sub to stay in 12-13m, weather calm.