Background Service sleeps when screen is locked

[gpsaliola]

Describe the bug The background service returns coordinates until the screen is locked. During the locked screen the service seems to sleep. After screen is unlocked the service restart to return coordinates.

To Reproduce Steps to reproduce the behavior: Add Location: Allow always to the app permissions. In Location.cs add a statement (WriteLog) to write timestamp to file

        public async Task Run(CancellationToken token)
        {
            await Task.Run(async () => {
                while (!stopping)
                {
                    token.ThrowIfCancellationRequested();
                    try
                    {
                        await Task.Delay(2000);

                        var request = new GeolocationRequest(GeolocationAccuracy.High);
                        var location = await Geolocation.GetLocationAsync(request);
                        if (location != null)
                        {
                            var message = new LocationMessage 
                            {
                                Latitude = location.Latitude,
                                Longitude = location.Longitude
                            };

                            WriteLog(location.Timestamp.ToString());

                            Device.BeginInvokeOnMainThread(() =>
                            {
                                MessagingCenter.Send<LocationMessage>(message, "Location");
                            });
                        }
                    }
                    catch (Exception ex)
                    {
                        Device.BeginInvokeOnMainThread(() =>
                        {
                            var errormessage = new LocationErrorMessage();
                            MessagingCenter.Send<LocationErrorMessage>(errormessage, "LocationError");
                        });
                    }
                }
                return;
            }, token);
        }

        private void WriteLog(string msg)
        {
            string fileLog = System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments), "log.log");
            using (System.IO.StreamWriter sw = System.IO.File.AppendText(fileLog))
            {
                sw.WriteLine(msg);
            }
        }

Expected behavior Run app and lock the screen. After 10 minutes unlock the screen and close the app. Connect the iPhone to PC and copy the log file that has been created and analyze the content. You will find a hole in the period that the screen was locked.

Desktop:

• OS: iOS

Smartphone:

• Device: iPhone 10
• OS: iOS 15.1

[gpsaliola]

Why this post hes been closed without any answer?