Should there be a connection interruption between the iPhone app and the Mevo camera, by default your recording/stream will continue at a wide shot until you can reconnect your device to the camera.
If you prefer that the recording or stream stay on the shot you have set rather that go to a wide shot, navigate to settings and tapping 'General.'
There is an 'Auto-wide on App disconnect' option. Toggle the switch to off.
Now Mevo will stay focused on the shot you set until you reconnect the app to the camera.