NavLinkProxy is a NavLinkCustomComponent?

i was doing a lot of things with navLinkProxy and i wanted to detect that the initial segment is a navlink. i thougt in the path Following Component. there is a variable from FNavPathPoint that contains the Id of Custom Link. and because i think the NavLinkProxy is a Custom Link. the id of the path in PathFollowing gonna get me to the navlink, but somehow it wouldn’t. is it a bug??
because even when it reach the NavLink the CustomLinkId always get me 0