You could try making a custom mission with a Clemson. And try to recreate the crash. I am not familiar with any special crash-sensitivity of this model. Then again, I haven't played Vanilla much. GWX 2&3 predominantly.
Then there are the notorious savegame issues with the game. Did you follow those rules? (I'm sure they are stickied somewhere) But those are mostly to prevent issues when loading the game. (Generally) Not when you've been playing the game for a while.
My own (single) crash-when-hit episode was years ago on a hot day with a dusty fan inside my computer. Probably a merchant also. So I don't have much help there.
|