Assassin's Creed Brotherhood - Epic street combat, sadly bugged

Was doing this memory where Ezio has to rescue two prisoners, then an epic combat between Ezio, the prisoners, his Assassins and a group of mercenaries began, having to defend themselves against waves of attackers. I love these missions.

However, huge thanks to Bugisoft for this great bug. Game randomly desynchronized me :D I'm having lot of bugs on almost each single memory I play... what a shame.

Take a look at the minimap. It seems that I get out of the "fighting zone", marked by that blue-colored area. However, this is bulls*** for many reasons, starting by the fact that the game didn't even warn me about leaving the area.