Sorry for the delay in getting back to you – I ended up out of town for a few days.
Rebooting the phone doesn’t cause the meter to come back (nor does enabling/disabling airplane mode) – and the LED idle light is no longer blinking on the meter when I’m not able to connect to it. The only way I’ve been able to bring it back is by opening it up and resetting it. After that, the LED lights up, and flashes the idle pattern until I connect.
Once I reset it, the app will connect with no problem – I get readings with no issues. I can even disconnect and reconnect within a relatively short time with no problem. The problem comes when I disconnect for more then 15 seconds or so (if I close the app, or move out of range of the meter) – the LED stops flashing and I can no longer find it on the scanner.