[BUG] [1.31] Friendly units 'stuck' in tactical combat

This bug is causing my units (or possibly just sovereign and champions, it happens early enough that my units are restricted to freespawn/stolen enemy units which haven't had high enough initiative to go earlier) to not be able to move normally in tactical combat whatsoever - any move taken causes them to run in place in the centre of the destination square and become unresponsive. I can still autoresolve combat from this point, but honestly, I'd rather not.

http://pastebin.com/AjsHhGxG