Oculus VR fork for UE - Grab Component and transparent material

I have BP with cube mesh and grab component. It seems that it worked before but after migrating to Meta fork for UE it cease to work. How can i implement grab component to a mesh inside BP actor?

2. After building apk and installing, this cube become visible, it should be invisive and is, in preview. But after building apk it is not longer transparent, what can i do.