In YWC I had Mary and Anslem marching to their target camps when Dracul landed. Dracul took the spot in which Mary was placed! Both Mary and Anslem moved their garrisons further behind (while still attacking)
The chaos it caused (Anslem suddenly walking before Mary and being intercepted) was funny, because I managed to retreat them both, only wasted a big catapult, but this sort of bugs is quite bad, let's hope it was some freak coincidence and not result of the latest changes.