I am pretty sure that the same used to happen with the first import of the torpedo boat by TDW (which, on turn, was the first dat unit ever imported in SH5). I don't remember what was the fix, but if memory serves me well, there was a controller in SHIII-IV which controlled the rendering of 2D "hole" decalcs on damaged units. This controller is unsupported in SH5 and might cause the messing up of textures when units are damaged. The removal of the said controller might solve the issue.
