Comment 6 for bug 730070

>I just produced a very stable deadlock. It does not resolve itself for a long time (maybe never).

This resolved itself fairly easily once I attacked one of Shevonar's buildings. They then proceeded to attack what I assume was their original target.

One interesting thing I noticed is that at the way back they started attacking the building I had taken over. I wonder if this could be because it was because it was the building they had left and they just wanted to get back in.

If you intend to look into this bug, see also bug 782744 which I am not sure whether is a duplicate or a similar issue. There may be some common issue which have triggered it in both games.