I'm having the same issues as you guys with vpn fusion and its been driving me crazy, especially with how long Asus take releasing updates, however there's a guy over on the rog forums who's posted a beta firmware that's supposed to fix vpn fusion issues. I've not been brave enough to try it yet...
I've been experiencing this for a couple of weeks now and its driving me crazy. Ive spent many hours figuring it out and realised its related to the ddns and let's crypt modules (it stopped working and the web ui returned). I guess your connecting to your router via https?
Yeah, ive been having issues that have been driving me mad, to the point i really messed up one of my nodes (another ax11000) but that a whole different story. Anyway not sure if it related but my issues have been around Let's Encrypt making the ui unusuable but i also found wireless and wifi...