[Bug]: sometimes plugin didn't upload location information after terminating In iPhone.

[mobiledev-svg]

Required Reading

• Confirmed

Plugin Version

v5.0.0-beta

Flutter Doctor

[✓] Flutter (Channel stable, 3.32.0, on macOS 15.6.1 24G90 darwin-arm64, locale ko-KR)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 16.3)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2024.2)

Mobile operating-system(s)

• iOS
• Android

Device Manufacturer(s) and Model(s)

iHpone15,

Device operating-systems(s)

iOS 18.6.2

What happened?

After confirming that the plugin works correctly while the app is in the foreground, I closed the app by swiping it away.

With the app fully terminated, I walked outside while monitoring the iPhone’s console logs. The iPhone was connected to Wi-Fi, and the network quality was unstable at times.

Approximately 10 minutes later, I observed the following behavior in the logs:

• The plugin unexpectedly changed its state to active.
• Several logs appeared showing failures and network-related errors.
• An error message was repeatedly generated:
  Failed to find a TSGeofence from monitoredGeofences: 71905

After this error appeared, no further logs were generated for about 3 minutes, indicating that the plugin had stopped producing output.

Plugin Code and/or Config

await bg.BackgroundGeolocation.ready(bg.Config(

      geolocation: bg.GeoConfig(
          desiredAccuracy: bg.DesiredAccuracy.high,
          distanceFilter: defaultDistanceFilter,
          stationaryRadius: defaultRadiusMeters.toInt(),
          stopTimeout: 5),
      app: bg.AppConfig(
        stopOnTerminate: false,
        startOnBoot: true,
        preventSuspend: Platform.isIOS ? true : null,
        heartbeatInterval: defaultHeartbeatInterval,
        enableHeadless: Platform.isAndroid ? true : null,

        /// android only
        notification: Platform.isAndroid
            ? bg.Notification(
                //title: "Tracking",
                text: "The Moni app collects location data in the background to help check your family members’locations.",
              )
            : null,
      ),
      http: bg.HttpConfig(
        url: uri,
        autoSync: true,
        headers: headers,
      ),
      authorization: bg.Authorization(
        strategy: 'JWT', 
        accessToken: token, 
      ),
      logger: bg.LoggerConfig(
        logLevel: bg.LogLevel.verbose,
        debug: true,
      )

Relevant log output

[christocracy]

Please do not post massive log content (your post was deleted). It’s a pain to scroll through. Save as file and attach.

Also see wiki “Debugging” and learn to use .emailLog method.

[mobiledev-svg]

I tried reproducing this issue again.
The attached file is the log file.
maxpro_재현 로그.txt

I saw the app notification of "Booted in background" that is "2025-12-11 18:52:27.456 🔵-[TSLocationManager ready]_block_invoke Booted in background" in log file when app was launched.

please check it.

[christocracy]

Have you tried testing termination behaviour of your app in the iOS simulator with "Freeway Drive"?

[mobiledev-svg]

Yes i have tried already. This was not appear in iOS simulator with "Freeway Drive".

[christocracy]

I suggest you test the /example app (in the 5.0.0-beta branch!)

https://github.com/transistorsoft/flutter_background_geolocation/tree/5.0.0-beta/example