My mum is using her first sensor (nhs funded) after doing the bianca course. She used one she bought in the summer, with no problems whatsoever. She still had the app on her phone, so she put the new sensor on yesterday and set up the high and low sugars for the alarm. However, the alarms are not working. Her sugar went up to 12 today, which should've set the alarm off. We've uninstalled and reinstalled the app, made sure all app permissions are on. It all worked fine in the summer, it's the same phone, same app, same login. It's scanning as it should, it's just these alarms. How do we get it to work?