Specific ARKit node not showing in AR

After two types of objects correctly inserted as nodes in an augmented reality setting, I replicated exactly the same procedure with a third kind of objects that unfortunately refuse to show up. I checked the flow and it is the same as the other objects as well the content of the LocationAnnotation, but there is surely something that escapes me. Could someone help with some ideas?

This is the common code, apart of the class:

func appendInAR(ghostElement: Ghost){
        let ghostElementAnnotationLocation=GhostLocationAnnotationNode(ghost: ghostElement)
        
        ghostElementAnnotationLocation.scaleRelativeToDistance = true
        sceneLocationView.addLocationNodeWithConfirmedLocation(locationNode: ghostElementAnnotationLocation)
        shownGhostsAnnotations.append(ghostElementAnnotationLocation)
  }