After a little digging, it appears that the IDs used for the transition are being redirected to "LHD IDs", something handled in the NAM Controller. Since such pieces should not need specific LHD paths, they don't exist and hence this is a LHD problem. For now, adding the attached file into the Network Addon Mod/Network Widening Mod folder will add a duplicate set of paths with the LHD IDs. However, the real fix is altering the controller code so these IDs don't get redirected in future.