Uninstalling/reinstalling will not affect this. Sorry about the non-existing docs for this feature, it’s very beta… Anyway, what happens is this: Every time you hit “6 zones” or “10 zones”, configuration values for ALL the zones of the sensor are sent to it.
Each zone is configured with 3 parameters: horizontal angle, vertical angle and midi note. For “6 zones”, the midi note of zones not used are simply set to 0 which disables that zone.
It might be, however, that due to the flaky Bluetooth implementation in Android, all these configuration values don’t reach the sensor. That seems to be the case in the screenshot above. If you hit “10 zones” again, all the zone configs will be sent to the sensor once more. If this doesn’t solve the issue, that usually means that Bluetooth on your phone has become unstable somehow. Sometimes, restarting the app or turning off/on Bluetooth on your phone solves the issue but many times a very hard reboot is the only thing that fixes it: Turn off phone, leave it turned off for a few seconds, turn it on.
One other thing worth to try is the new “Forget” menu option in the sensor detail screen. That removes pairing information and forces the phone to create a new bond to the sensor next time it connects. That sometimes helps.