Patch 3 Notes:
-Gameplay: this includes bugs like Arno getting stuck on certain areas of the map (including a few more hay carts), problems with getting into/out of cover, character animation bugs, and general camera problems
-AI & Crowd: in this category are problems with NPC animations, crowd events, and crowd stations, NPC navigation issues, as well as bugs related to NPCs detecting Arno’s activities in various situations
-Matchmaking & Connectivity: this covers a number of issues related to co-op play, including bugs with joining games in-progress and problems that happen during host migration
-Menus & HUD: fixes in this category will address missing details in certain menus, problems with some of the mission objective and co-op update pop-ups, localization inconsistencies, as well as some of the issues with menus and pop-ups overlapping each other
-General Stability: this includes fixes for a number of crash situations we've identified in both campaign and co-op modes.
Source : Link