EnableCallbackTimer Bug?

It seems that calling EnableCallbackTimer = False inside the Timer event of a TaskDialog control doesn't stop the callback timer from firing...Example:

Private Sub TaskDialog1_Timer(ByVal MilliSeconds As Long, Reset As Variant)
    mlngDialogFirings = mlngDialogFirings + 1
   
    Debug.Print mlngDialogFirings   ' Keeps printing even after calling EnableCallbackTimer = False (below)
    If MilliSeconds >= (mclngRetryAttempts * mclngRetryDelayMS) Then
            With mobjTaskDialog.TaskDialog
                .EnableCallbackTimer = False    ' Should stop the callback, but it doesn't!
                .ProgressBarStyle = xtpTaskProgressBarNone
                .MainInstructionText = "Could not connect to project"
                .WindowTitle = "Project Locked"
                .EnableButton xtpTaskButtonRetry, True
            End With
        End If
    End If
End Sub

Any chance of a fix?