Refer to this post for detailed rend mechanics Rend mechanics 2.6.7 - #3 by sVr-21743. AD only benefits hard cast rend and not ambo rend. Did you cast rend yourself maybe?
Refer to this post for detailed rend mechanics Rend mechanics 2.6.7 - #3 by sVr-21743. AD only benefits hard cast rend and not ambo rend. Did you cast rend yourself maybe?