RAX 120 authentication issues

No issues here, tbh letting it auto update is not the best thing to do, manually update then factor reset. You have to remember these are bleeding edge routers, so a factory reset is really worth it. I would suggest turning auto update off too, and check once a week manually. Also dont update using the Nighhawk app, as some have had issues that way, its best to update via the GUI though a wired connection. My routers been up since the release of 1.0.1.114 and I'm not seeing the issues you have, the only thing I can think of is I factory reset the router. Rebooting it is not enough. Hope that helps.