I literally just posted a replay of it happening, mate. If your going to claim things like this you need to actually post some proof.
Also 325 munitions for this is cheap as hell considering it it can cause more damage than 3 IL-2 bombing runs.
This is what I do, always provide a proof.
Going to edit this post in 5mins with proof.
I think it's enough.
If you use ability ON the truck, it's going to die, but rest trucks near will be totally safe (damaged but no destroyed).
If you use it in the middle of the trucks, you will damage trucks a bit more, but there is a chance that all of them might survive (a bit low chance) so in the end it's better to use it in the middle of the trucks, but still, who's goona place trucks like this around 1 point next to each other?
Place it more reasonable and it won't even tickle rest 2 trucks.
AS was used both times in the middle of trucks. Once I used it on the Schwerer, it almost did not nothing to the rest so I even did not upload it.