[Bug]: onGeofence not triggered for initial geofence entry on iOS after fresh install

[Jonny1987]

Required Reading

• Confirmed

Plugin Version

4.16.9

Flutter Doctor

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! Doctor found issues in 1 category.

Mobile operating-system(s)

• iOS
• Android

Device Manufacturer(s) and Model(s)

iPhone 8

Device operating-systems(s)

iOS 16.7.10

What happened?

After a fresh install, both start() and startGeofences() do not trigger onGeofence on iOS (when geofenceInitialTriggerEntry = true) when the user is in the geofence. However, an EXIT even still occurs when leaving the geofence.

Subsequent calls to start() or startGeofences() do trigger onGeofence though.

This was tested with a real device outside.

Plugin Code and/or Config

bg.Config(
  desiredAccuracy: bg.Config.DESIRED_ACCURACY_NAVIGATION,
  distanceFilter: 10.0,
  stopOnTerminate: false,
  startOnBoot: true,
  debug: true,
  enableHeadless: true,
  logLevel: bg.Config.LOG_LEVEL_VERBOSE,
  geofenceModeHighAccuracy: true,
  notification: bg.Notification(
    title: 'Background location tracking',
    text:
        'This ensures you will be automatically checked-out when you leave',
    smallIcon: 'drawable/ic_notification',
    color: '#18B09C',
    sticky: true,
  ),
)

// This is how I start the tracking
final now = DateTime.now();
final start = DateTime(now.year, now.month, now.day);
final end = now.add(Duration(minutes: minutesUntilExpires));
final scheduleStr =
    '${DateFormat('yyyy-MM-dd HH:mm').format(start)}-${DateFormat('HH:mm').format(end)}';

final config = bg.Config(
  schedule: [scheduleStr],
);

await bg.BackgroundGeolocation.stopSchedule();
await bg.BackgroundGeolocation.setConfig(config);
await bg.BackgroundGeolocation.removeGeofences();
await bg.BackgroundGeolocation.addGeofence(
  bg.Geofence(
    identifier: venue.id.toString(),
    // radius slightly larger than radius when fetching venues to ensure we avoid
    // potential issue of checkin button appearing when we are outside the geofence radius
    // which will cause no EXIT event to be triggered when user leaves (since we need to have an ENTER
    // event first)
    radius: geofenceFetchRadiusMeters + 10,
    latitude: venue.lat,
    longitude: venue.long,
    notifyOnEntry: true,
    notifyOnExit: true,
  ),
);
bg.BackgroundGeolocation.start();
bg.BackgroundGeolocation.startSchedule();

Relevant log output