Black Flag Resynced 1.0.4 Fixes the Jackdaw Bug That Could Ruin a Run

A ship-upgrade screen should not turn into an ambush by your own crew. Assassin’s Creed Black Flag Resynced update 1.0.4 is now rolling out across PC, Steam, PlayStation 5, Xbox Series X, and Xbox Series S, and its most important fix addresses exactly that kind of progress-killing nonsense: a rare docked Jackdaw upgrade bug that could make the ship disappear and trigger an unexpected mutiny.

That is the patch note worth caring about. Lighting tweaks and cleaner weather help the remake’s atmosphere, and PC performance work is welcome, but fixing a bug that can punish players for using a basic upgrade menu is the real quality-of-life win. Ubisoft Barcelona and creative director Manel Cota have spent much of Resynced’s rollout selling a more polished return to the Caribbean. Patch 1.0.4 is the less glamorous part of that promise: making sure the game holds together when players engage with its systems.

The Jackdaw fix matters more than the patch-note cosmetics

The affected issue occurred when upgrading the Jackdaw while it was docked. The ship could disappear, access to the upgrade flow could break, and a mutiny could begin without the player having done anything that should provoke one. For a game built around steadily improving a pirate ship, that is a spectacularly bad place for a bug to live.

Ship progression is not optional side content in Black Flag Resynced. It feeds directly into tougher naval encounters and later-game demands. A rare bug remains rare until it burns through the save file of the person who hit it. Ubisoft has targeted the right problem here, even if it is also a problem the game should never have shipped with.

Weather, lighting, and localization are getting needed cleanup

Update 1.0.4 also makes adjustments to lighting and environmental presentation, including indoor and cavern lighting, alongside weather behavior intended to make conditions clearer. The broad aim is obvious: the Caribbean needs to look dramatic without turning navigation or visibility into a guessing game. Fog and storms are part of the fantasy; visual inconsistency is not.

Localization corrections cover Simplified Chinese, Italian, and Arabic. These fixes rarely get headline treatment, despite being the kind that determines whether major menus, instructions, and story beats are functional for entire groups of players. They deserve to be treated as core maintenance, because they are.

PC players finally get attention on cutscene performance

On PC, the update addresses a 30-FPS cutscene limit that could occur under custom graphics settings. A cinematic frame-rate cap is one of those technical irritations that makes a game feel older and rougher than it needs to, especially after players have tuned the rest of the experience around higher performance.

The patch also includes audio, visual, animation, interface, and general flow corrections. That broad sweep is revealing. Resynced’s post-launch work is still concentrated on friction points rather than flashy additions, which is exactly where Ubisoft needs to be spending its time.

Verify the dockside fix before spending on later upgrades

• Dock at any port after installing update 1.0.4.
• Open the Jackdaw upgrade menu or purchase a secondary weapon.
• Confirm the docking animation finishes normally and the upgrade menu remains available.
• Check that the crew does not trigger a mutiny and that the Jackdaw remains present.
• If the bug returns, restart the game and verify that update 1.0.4 is installed through the platform’s system menu.

The next thing worth watching is whether this fix holds across older saves and the more demanding stretch of ship progression. Players should be able to invest in the Jackdaw without treating every port visit like a high-stakes gamble. That is a modest standard. It is also the standard this patch needs to meet.