What’s your Android phone and version? Android BLE support is still quite patchy, I’ve learned some of the caveats of the different manufacturers but not all.
With the Android app – after you successfully uploaded firmware, was the meter blinking on and off slowly and continuously? Or did it give 2 or 3 long slow blinks, then stop, waking up to flash very briefly?
I’m guessing it’s the latter, and that the issue you’re having on Android sounds like the service discovery bug – Android caches the services offered by the device and sometimes does not clear the cache when reconnecting to the same device. If you want to try to upload beta firmware again, I would try uploading the firmware, then rebooting the Android phone before reconnecting.
I hope this is helpful, best