Geofence Events Suddenly stops

I am facing an issue I have set geofences to a device and it has worked fine for one day
and after one day it has stop sending notifications
I have checked my database there was no event for geofences but there are other events
What can be the issue that other events are storing in database but not geofence event
and When I restarted the server it again started receiving the geofence event as well.

and after two geofence events it again stop receiving and storing the Geofence event in database

Please help me to resolve this issue
It is working for other events and geofence events are captured and stored in database
What should i do