ships desapear infront of me

[Aquelarrefox]

this is very extrenge in all my years playing never see something like this.
i play an hybrid from mygm and wac5, i get torpedoes for a mx11 from mfm, hit and explode as normal, i hit a "small merchant" i bealive from wac (its hi def, a small merchant thith the stiks pointing down, no mathers), and it desapers.
it desapear and only see water moving in the point the bow hits the water, it didnt check the sinking.
someone know whats happens (and its not issue from wac¿s fx, von dos and fmf ships didnt do this).
Of course it didnt ctd... more strange.