A new patch has been released for Assassin's Creed Unity which aims to fix a wide variety of issues ranging from performance to graphical glitches. Ubisoft officially addressed the additions to be included in this new patch as follows:

This patch will address issues with stability and performance as well as online matchmaking and connectivity (among other fixes and improvements).

If you want to download this patch, you should be aware that it is about 6.7 GB in in size, which is pretty big for a patch.

Ubisoft has also shared the official changelog of the patch, which you can check out below. The patch is now available for PS4 and Xbox One players and will be released for PC players at a later time.

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

As part of our ongoing efforts to provide the best experience for our players, we will be releasing Patch 4 for Assassinís Creed Unity today. This patch is mainly focused on alleviating performance issues and improving the overall experience.

Part of the teamís effort to enhance frame rate for players involves replacing and updating portions of the Paris city map where we are seeing issues. This explains the large size of this title update (6.7 GB). However, since a large portion of the patch replaces existing files the net increase to the gameís overall size will be less than 6.7 GB.