During a battle in mordor next to a mounainside ... i made the orcs rout ... won the battle ... but the battle didn't end ... however on the minimap it showed that a unit was left somewhere in the middle of the battlefield ...i searched the battle map for a while when i actually realised that there was indeed 1 orc still standing ... on impassable terrain trying to root ...i didn't had archers and i couldn't get there to kill it ... well i retreated my army ... the entire army left the battlefield and the battle still didn't end ... i also forgot to mention that the timer was also ended ...
The weird thing was that never ever again happened to me something similar ... in any TW game or mod ...