Patch 4 release date: December 16th
Platforms: PS4, Xbox One
PC coming later this week.
Size: 6.7 GB
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