Is something changed or wrong with naval and underwater shells?

Game Discussion General Discussion
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1

For few months now I have been noticing while playing high tier naval, shells under waterline seem to just dissapear and do no damage. Making some ships feel more durable than they should be, especially considering for example Italian and French sadly battleships having pour accuracy. (Dispersion on Jean bart is so bad that at 15km My shells dispersed everywhere but enemy ship and accidentally hit a missile destroyer 250-300m away from ship I was aiming at killing the destroyer, but that is besides the point)

Do shells once they hit water just dissapear or is there something bugged? I know shells interact with water, like bounce, but about the penetration bellow water line I have no Idea what is happening or how shells interact with water, how water reduces penetration if it reduces it.

I basically just want to know if its bug, or feature, or some oversight.

2

As far as I know, shells hitting the water and disappearing has been a thing since day one or the japanese would be the undisputed queens of naval since their shells were specifically tailored to the concept of diving.