NullReferenceException-launching-a-compiled-strategy

I got this exception when launching a compiled script (clicked on the script on the sidebar). Didn't have issue with launching the same script earlier. Build 38. I had Visual Studio debugger attached - not sure if that was a factor here. I re-launched WL again and the script is launching normally - no issues. So this exception was only one time - not sure if it is worth your time to investigate it. But just posting here as a data point to improve the product in case it rings a bell.

System.NullReferenceException: Object reference not set to an instance of an object.
at (Object )
at ProccesorProcess.PatchInterceptor(Object , ProccesorProcess )
at WealthLab7.designerCompiled.UpdateUIFromStrategy()
at WealthLab7.cwStrategy.SelectIdentifier(Object )
at WealthLab7.cwStrategy.RemoveAccount(Object spec, RoutedEventArgs pol)
at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised)
at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args)
at System.Windows.BroadcastEventHelper.BroadcastEvent(DependencyObject root, RoutedEvent routedEvent)
at System.Windows.BroadcastEventHelper.BroadcastLoadedEvent(Object root)
at MS.Internal.LoadedOrUnloadedOperation.DoWork()
at System.Windows.Media.MediaContext.FireLoadedPendingCallbacks()
at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)