Hi Gavcur,
Thank you for reaching out to us in our community and welcome back, sorry to hear your Connect App ist finding your Router when you are trying to search for black spots, we appreciate you have tried all advised by Tom which hasn't resolved it, you can find further help and support around our Connect App here.
Can you also make sure you are accessing the app whilst connected to your home Wi-Fi (it wont work if connected to another network, mobile data, or if a VPN is active.
Have you have tried a Pinhole reset on the hub (inserting a pin in the hole marked 'reset' on the back of the hub for 60 seconds)?
Please let us know how it goes and whether you need any further support.
Regards
Paul.