Units retreating from a combat started by autospawning maenads in your province (spawned by stealthing Pans) seem to disappear after the combat, instead of actually retreating to any adjacent province.
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http://www.shrapnelcommunity.com/thr...b=5&o=&fpart=1 )
I can attach the gamefiles if they're needed, but someone will have to explain how to go about it. (sorry, I'm no good at computer stuff - except gaming of course) The bug is very easy to reproduce though. Just have a Pan stealth around anywhere, and have an opposing force with retreat orders lounging in that province, et voilą.