Accessories not found during pairing (Edge 1030 and Iphone)

Hi All,

It was necessary to re-pair my Garmin Edge 1013 with the iPhone. 
The Bluetooth connection worked.


If you then click on Devices in the app, the Edge can also be added manually. (BT can be found in the list of accessories and can be selected)
At the same time, the Edge continuously searches for the phone with “Waiting for phone.”
The next step is to establish a connection with the Edge in the app. The “Search for accessories” window appears again, but this time NO accessories are found.

What could be the reason for this and why does the window appear twice?

Thx, Volker