Feedback Unity Bug? Update Function is not being called

I post my code here:
Update is not being called and LateUpdate works well.
It's attaching on an UGUI element.

public class UIFollowWorldPos : MonoBehaviour
{
public Transform worldObj;
public Camera cam;

void Awake()
{
cam = Camera.main;
}

public void UpdatePos()
{
if (worldObj == null || cam == null)
return;
transform.position = cam.WorldToScreenPoint(worldObj.position);
}


// unity bug?
private void Update()
{
//Debug.Log("au");

}

private void LateUpdate()
{
//Debug.Log("aa");
UpdatePos();
}
}

 

Here is a gif record when problem happened.
It seemed like being culled.
My unity version is 2018.3.0f2

 

It kind of looks like your script is getting disabled when you're not looking at the object. I don't suppose you have any kind of code that disabled objects, or their components, when they go offscreen?

That wouldn't explain why LateUpdate would keep getting called, though. Maybe add the object's name to your Debug, in case there are more than one object of this type in your scene?

 

It's only just one script in the scene. I ignore this problem for now by moving logic to LateUpdate.

 

Might be worth confirming that the GameObject the MonoBehaviour component is attached to is active, the MonoBehaviour is enabled, and it's parent GameObjects in it's hierarchy are also enabled.

To check this maybe put in LateUpdate:

Code (CSharp):

1. Debug.Log("gameObject.activeInHierarchy: " + gameObject.activeInHierarchy);
2.             Debug.Log("gameObject.activeSelf: " + gameObject.activeSelf);
3.             Debug.Log("enabled: " + this.enabled);

It would be a very strange error for this to occur.

One reason I can think of is that you've baked a occlusion culling map, and the object is being culled when out of view.