Mongol campaign Blockade at Lumen Shan

Hiya, this appears to still be a thing as its something I have now encountered. I researched it already and went off searching the lanes myself, even put up towers everywhere trying to spot every nook and cranny. Nothing. Is there any confirmation this is even being looked at? I see none anywhere in the known issues or update threads. This break does not allow us to continue the compaighn…at least not without restarting and doing some sort of sneak trick to manipulate the bug. Which I really have no interest in starting over again.