I recently got SH4 Gold Edition and have been playing for a while. I have TMO and RSRD. Twice now I've spotted a lone freighter in really bad weather, so bad that I can't see the ship til I'm practically on it, so torps won't work. (I think.)
So I proceed to blast it with my deck gun. As soon I get the message that the ship is going down, my sub takes a ton of damage, literally everyone is killed and everything is destroyed.
I can only think of two things, either I got hit by debris from the freighter, or it's a bug.
Sadly, my save game is a few 100nm back.

Anyone experience this or know how to fix it?
Thanks