We have put together a short survey to capture your feedback in terms of what BT can do when you experience home Wi-Fi issues. We would appreciate it if you could take a couple of minutes to complete a short survey. Read more from here, Fix my home Wi-Fi
Yes I have the same problem.
I have 2 systems, the first is on the latest firmware and works fine through the app on my iphone.
The second system in a different location has not had the firmware updated and I can no longer access thought the iphone app.
To be honest, new firmware been used now for quite some time by many users and it seems pretty stable. I’d upgrade if I were you..