🐞 Periodic Task running before set frequency

[om1cael]

• I have read the README
• I have done the setup for Android
• I have done the setup for iOS
• I have ran the sample app and it does not work there

Version

Technology	Version
Workmanager version	0.8.0
Xcode version
Swift version
iOS deployment target

Describe the error
Hi, I'm using WorkManager and flutter_local_notifications to show notifications with a set frequency (each 2 hours), but the task does not seem to be respecting the interval.

    await Workmanager().registerPeriodicTask(
      'notification',
      'notificationTask',
      frequency: Duration(hours: 2),
      inputData: {
        Settings.wakeUpTime.value: formattedWakeUpTime,
        Settings.sleepTime.value: formattedSleepTime,
        'title': AppLocalizations.of(context)!.reminderNotificationTitle,
        'body': AppLocalizations.of(context)!.reminderNotificationBody,
      }
    );

You can see the frequency is set to 2 hours, but I see notifications being sent with a 15-30 minutes interval from each other.

[CanGonulacar]

iOS

On iOS, options are much more limited. The systems decides when to give an app the chance to perform a background fetch, so that the app appears to remain “alive”.

The only control we have is the minimum background fetch interval, but iOS may decide to never start our app to perform a background fetch (for example if we take too long before returning a UIBackgroundFetchResult to the completionHandler).

I ran periodic tests on Android for 6 hours and 12 hours, and it worked fine, but don't expect the same on iOS.

[om1cael]

No, it's not an iPhone. The device I use to test runs Android 15 (OneUI 7).