Our opposing side commander has sent me this message.
I see at least 1 error so far - there's a Blue bulldozer in a bridge rebuilding mission that I never ordered, and it cannot be stopped. It's trying to rebuild bridge 15. Might that have occured automatically due to some movement orders, and it decided to build a bridge to fix the movement error? I didn't try to mave any units south of the destroyed bridge in question.
Would an engineer normally do that if it was in range of a destroyed bridge?
All engineers will attempt to repair any bridges that they are close enough to. You can only stop this by moving them away. Engineers will not move of their own accord to destroyed bridges. In fact, no unit will move by itself.