I tried a few things but this ultimately worked: I bought a male miniDP to male miniDP cable and replaced Vive Pro cable (miniDP to DP), plugging it in between the link box and the top of the Omen X.
Its not a common cable, I found it on amazon here:
https://www.amazon.com/gp/product/B0777RKTJB/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1