Nvidia Hairworks and VXAO

Hello,

I want to render out passes for my character that include skeletal mesh and nvidia hairworks both in a blueprint. I want to extract beauty and occlusion pass. Everything looks good in the occlusion pass but the hairs are looking kind of weird, it does look like having a transparency thing going on. I have played almost every value or texture in the apex file, the silhouette of the head is very visible. I also tried HBAO+ as a separate pass but am unable to use it due to its swimming effect of the edges and the flickering that it gives on very detailed meshes.

Thanks