xamarin.forms android service run twice after restarting it - xamarin.android

Question

I have this code that create an android service
[Service]
public abstract class LongRunningTaskService : Service
{
public override IBinder OnBind(Intent intent)
{
return null;
}
public override StartCommandResult OnStartCommand(Intent intent, StartCommandFlags flags, int startId)
{
Logs.Info("service started: " + this.GetType().ToString());
try
{
Tasks.RunTask(() =>
{
try
{
Task.run(() => SomeTaskFunction);
StopSelf();
Logs.Info("service ended successfully from main task");
}
catch (Android.OS.OperationCanceledException e)
{
Logs.Warning("Error in Tasks.RunTaskWithoutWaitForResult", e);
}
});
return StartCommandResult.NotSticky;
}
catch (Exception e)
{
Logs.Warning("error in OnStartCommand", e);
return StartCommandResult.NotSticky;
}
}
public override void OnDestroy()
{
try
{
Logs.Info("service destroyed: " + this.GetType().ToString());
base.OnDestroy();
}
catch (Exception e)
{
Logs.Warning("Error in service destroyed: " + this.GetType().ToString(), e);
}
}
}
when i create the service the first time it works ok, but when i destroy it from outside the service and recreate it with the same function to run there are 2 tasks running at the same time.
what am i doing wrong ?