After loading a savegame (turn 270) I noticed 5 units of draftees assaulting an unprotected city of mine. Frustrated that I didn't notice them before, I loaded turn 269. Turn 269 started with the exact 5 units of draftees assaulting (not just besieging) the same city. I loaded each and every savegame back until turn 260 and the exact same thing was happening. I realized that this must be some nasty bug connected with the loading of a savegame, as with each savegame I load, the specific city is being assaulted (not just besieged) by the same 5 units of draftees. Please advise.