Check that the “RecastNavMesh-Default” actor in your level is at the origin.
Try the following steps:
- Delete “RecastNavMesh-Default”
- Add a NavMeshBoundsVolume, this will add a new “RecastNavMesh-Default” at the origin
- Delete the newly added NavMeshBoundsVolume
Edit: If this doesn’t work for you, try checking out this answer Nav Mesh moves when playing - World Creation - Epic Developer Community Forums