I was getting my gear ready for our next AutoX and was having some problems with connections between the Kiwi ODBII Bluetooth, GoPro 7 Bluetooth/Wifi and TrackAddict Pro on my iPhone 7.
I started by resetting the wifi connectivity on the GoPro 7 (Preferences > Connections > Reset). The result was that the GoPro then creates a camera name and SSID/password credential. Because I had done this a few times, I had multiple entries for the SSID and Bluetooth connections on my iPhone. I deleted all these to get a clean slate.