When i was called to a Crusade(first failed) the mission was to Conquest Hierosolyma.But when i was besieging the town the other members came and besieged too. So i waited like 9hours(ingame) building ladders but other member was faster now i could join assault(i joined).I succesfully besieged Hierosolyma and tooked myself. After that the others still besieged the town even it is mine now and now there is an endless loop telling me my town is besieged -_-