decal cannot mix the mesh normal map

hi ,I am using the vray 6 new decal ,but decal cannot mix the under mesh normal , Is this correct ?How can I use it correctly decal ? I hope they can integrate gloss and normal information between them?

Working fine this end!

Hi there
Perhaps you have “Use Only Decal Bump” on? It is enabled by default. You can find it under the Bump mapping rollout in the Attribute editor for the Decal attributes.