I'm using MVVM cross in my application. I face System.Threading.Tasks.TaskCanceledException Message=A task was canceled in this part of the code.

public override void ViewDestroy(bool viewFinishing = true)
     {
                if (viewFinishing
                    && CloseCompletionSource != null
                    && !CloseCompletionSource.Task.IsCompleted
                    && !CloseCompletionSource.Task.IsFaulted)
                    {
                        CloseCompletionSource?.TrySetCanceled();
                    }
                base.ViewDestroy(viewFinishing);
        }

This exception raises only some times but not all the time.