Hi,
I am sorry to say this, but the issue is not resolved. I have no update from the ticket I opened 15 days ago. I can understand that this issue has a low priority or no solution yet, but please, don't mark it as resolved if it's not.
Something I've found out today. If you change the room the sensor is assigned to, it disappears from the alarmzone configuration list. So, maybe there is some relation there.
Regards,