I just set-up a new Deco BE85 system (coming from Orbi) due to some security concerns. I changed network name and password and am painfully adding all of the devices one by one (40+). Two of my kids were away when I set it up and when they returned they were able to join network without the password. I did not share the password and they both told me "it just worked when I selected the network".  How is this possible? They both had iOS devices, but the password was not shared with them. This is very concerning, I spent a considerable amount of money on this system to protect our network and this happens. I see a few other people this has happened to without any resolution.

Any ideas?