It doesn't make any sense...

[Edi]

Sounds to me like you've run into a bug. I never experienced that kind of problems with CoE2, but I didn't play it very extensively.

Siege engines tend to be brutal though. I don't remember if they work the same in CoE2 as they do in CoE3, but even one on the defense makes the proposition of assaulting fortified structures iffy unless you have a huge horde.

[samoht]

I may have figured out part of why it was happening. I think the dwarf lord was wearing a magical item that gave him the "immortal" ability or trait or what have you. He had the same symbol that means immortal in Dom3. Just a guess.

IF... that is the case, how do you get around it in CoE?