Cubemap and AssetBundles issue

Hi Everyone!

I'm having some problems with AssetBundles and CubeMaps together.
I have a bundle with some assets including a skybox material and a cubemap.
When I load the assets and I set the material as the enviroment skybox, it looks like all texture are missing.
I tried to save the cubemap into a public variable to see the inspector and this appears.
The texture is considered 0 byte...

I don't have any problems with others kind of assets (gameobjects, audioclip, textures etc)



If someone has any idea please can you help me?
Thank you in advance!