Assetbundle loaded asset cannot be cleaned in Android

Hi...

The question is a bit strange to me.

I have loaded the asset and Instantiate it:

 GameObject cloneRef = GameObject.Instantiate(loadedAsset) as GameObject;

And Unload the bundle:

 bundle.Unload(false);
 bundle = null;

After change to another scene, I run:

 Resources.UnloadUnusedAssets();

but the gameObject inside loadedAsset is still existing in Android.

I profile it in Editor and it is gone correctly. So weird

Anyone can help?

Many thanks