If this is an arming reminder notification, has your system been disarmed at any point when you left the radius? If your system is armed you will not receive the reminder.
I have deleted & re-added the “arming reminder” notification a couple times but still no luck unfortunately. I’ve also toggled the Geo-Services enable button in the app itself, as well as, Location Services settings on the iPhone (set to Always), but no notifications. I can def verify that my phone (and it’s Location Service settings) are fine, 'cause I already receive geo-notifications from a separate app I use called geo-hopper. So not sure what’s preventing ADC alerts.
Also, I’m not disarming from outside the 2.5 mi radius. I simply leave with alarm off and hope for notification once I’ve gone outside the perimeter and so far nothing happens, so I set alarm to “Away” to enable.