Characters Not Moving in Levels 1 & 4 After Packaging (UE5.4 + PaperZD)

Hi, I’m having a strange issue with my 2D/3D game using Unreal Engine 5.4 and PaperZD.

In my game, the characters move as expected in Levels 2 and 3. However, in Levels 1 and 4, the characters are not moving after packaging. Interestingly:

  • The AI is working fine in all levels.
  • The characters move correctly in Standalone Game and Viewport mode.
  • Levels 1 and 4 share the same GameMode, which is different from the one used in 2 and 3—so this could be a factor.
  • When packaging, I get the following warning:
    Warning: NavData RegistrationFailed_AgentAlreadySupported, specified agent type already has its navmesh implemented.

Things I’ve tried:

  • Verified that PaperZD Anim Instances and AI Controllers are correctly set up.
  • Confirmed that NavMesh exists and is built in all levels.
  • Checked World Settings to make sure the GameMode override is properly assigned.
  • Validated the character movement component is active in Levels 1 and 4.

I’d really appreciate help narrowing this down—especially how to resolve the navmesh warning or confirm whether GameMode settings could be affecting this. Thanks!