Assassin's Creed Unity Update v1.4.0 changelog:

Stability, Performance and Save Game

-	Fixed numerous random crashes both on Campaign and Coop
-	Implemented multiple optimizations and fixes to improve overall performance
-	Fixed save issue caused by the companion app on the main menu (loss of data)
-	Fixed save issue caused by contacts list (crash occurring). Users should now have access to save

Gameplay (navigation, fight, stealth)

-	Fixed various navigation issues
-	Fixed issues with lock picking chests
-	Fixed additional haystack issues

Character, AI and Crowd

-	Fixed various character, crowd station and NPC issues

Online, Matchmaking, Connectivity and Replication

-	Fixed various matchmaking and connection issues both in matches and when starting a match.
-	Fixed various issues with voice chat
-	Fixed join-in-progress issues
-	Fixed various replication issues between host and clients
-	Fixed issues with player rank and COOP/heist rewards
-	Fixed issues with Helix credits
-	Fixed issues with the My Club feature

Menus and HUD

-	Fixed HUD icon issues and issues with map information
-	Fixed various Initiates issues
-	Fixed additional issues with notifications

Mission tweaks (campaign, coop and side content)

-	Fixed various low occurrence walkthrough breaks in both Campaign and COOP
-	Fixed various NPC issues
-	Fixed issue with the quest log disappearing for specific side missions

World and 3D

-	Fixed various collision and mesh issues
-	Fixed additional issues where player would fall through the world
-	Fixed specific areas where textures were missing

PC-Specific

-	Fixed crash on "Quit to Windows" in free roam mode
-	Fixed crash on accepting multiple "Join the club" requests
-	Fixed issues with TXAA
-	Fixed issues with PCSS
-	Fixed issues with textures on NPCs
-	Fixed black texture issues on MSAA-4x, MSAA-8x and TXAA
-	Right Control now can be assigned as a hotkey
-	Minor UI fixes