Modern Warfare 4 DMZ Update Fixes Major XP Bugs and Frustrating Mission Issues

These changes are particularly relevant because DMZ combines exploration, combat, and objective completion within the same deployment. A technical problem affecting a mission interaction can interfere with an otherwise successful run.

Weapons, Operators, and FOB Issues Also Addressed

The update includes a fix for the ISO Apex Attachment, which was not functioning as intended in DMZ.

However, the patch notes do not specify the exact malfunction or provide any new weapon statistics. There is therefore no confirmed basis for treating this correction as a weapon buff or a change to the competitive meta.

Several equipment and interface problems have also been resolved:

• Fixed the Gunsmith Attachment menu remaining stuck onscreen during deployment.
• Fixed the Impact Smokes Pro Trait failing to activate when a player was downed.
• Fixed an issue preventing players from equipping an Active Duty Operator in their Showcase.
• Fixed incorrect descriptions for certain DMZ Orders.
• Fixed a problem that prevented Nintendo Switch 2 players from purchasing saved Blueprint modifications.

The Forward Operating Base also receives attention.

Selecting Untrack Recipe at the 3D Printer when no recipes were being tracked could unexpectedly remove players from the FOB.

Another issue could cause a soft lock if players sold starting equipment or dismissed Active Duty Operators carrying starting equipment before their first deployment.

These corrections should make equipment management and pre-deployment preparation more reliable, particularly for players beginning their DMZ progression.

Additional AI, Visual, and Campaign Fixes

Beyond progression and equipment management, the update addresses several environmental and technical issues.

Enemy AI could occasionally run over players during infiltration, while certain rocky areas in Hajin could trap Operators. Both problems are included in the fixes.

Developers also corrected shadows visibly appearing and disappearing around the FOB and addressed additional crashes and stability issues.

The Campaign receives a separate correction for a progression blocker during the Hotel sequence of Counter Attack.

This is the only Campaign-specific issue listed in the supplied update, with the remaining changes primarily focused on DMZ.

What the October 20 Update Means for DMZ Players

Rather than introducing new weapons, changing damage values, or adjusting the overall balance of DMZ, this update concentrates on removing obstacles that could interfere with ordinary gameplay.

For squads, the Commander reward correction is especially relevant because progression should no longer depend on which player delivers the final hit.

For solo players and those working through story missions, the fixes to Breaking New Ground, Dynamic Operations, and equipment management address situations that could interrupt progress.

The update arrives during DMZ Early Access, which began October 20, ahead of Modern Warfare 4's full release on October 23.

Players looking for additional changes should follow the official Call of Duty patch notes, where the developers indicated that the broader launch patch notes would be published.