ASUS first tried this new UI on their ExpertWiFi series of products. It has been incorporated into the GT-BE19000Ai as the main interface. If you'd like to see what it's like this appears to be almost perfect replica of what I see on my EBG15. One...
I hope to get one when it's finally released but hoping for just one unit, meaning if anyone else local is also interested can split a multi pack and save a little over buying one unit individually...1-piece $699.992-piece $1299.99
Set it up as you've done with prior ASUS routers, submit a Feedback log. Describe the problem and time/date of failed connection attempt. In about 1 - 2 weeks try the connection again, even without a firmware being published/released.
Submitting feedback as kindly mentioned, with the time/date of the occurrence, is a great way to make ASUS tech aware of the concern. They don't promise to respond directly but will try to resolve it in a future firmware update.