WSP MBT bug?

[AlienXXX]

Hello fellow SP players !

Something happened on one of my present PBEM games that left me quite surprised.

As I watched the replay of my opponent's turn, I could see that he put a lot of machine gun and rifle fire on one of my jeeps. I could hear some of the bullets hitting the jeep, but no damage was reported.
When moved to that area of the map, I could see the "smoke" around the vehicle that you sometimes get when a vehicle is immobilised. I rallied the jeep, and found it was indeed immobilised.

The unit information screen shows damage = 0.
I thought that to immobilise a vehicle you would have to do some damage to it, and therefore the damage score would be 1 or higher.
I thought "damage" to a vehicle includes killing crew members. Is this correct?
Can a soft vehicle be immobilised and still have a damage score of 0 or is this a bug?

Thanks for your comments
Cesar / AlienXXX