@Riley_S my phone didn't update..it also wouldn't explain why my phone connected to one camera but not another camera. I tried reinstalling as well but no luck. It was the actual handshake between the camera and my phone that was stale and needed resetting.

what I did to resolve the situation was the following (hopefully it will help someone):

on my iPad:

1. Open the camera live view
2. Let it stream for 10–15 seconds
3. Then close the live view
4. Immediately try opening it on my iPhone

Sometimes the iPad holding the stream session prevents a second device from negotiating properly (especially after app reinstalls).