Can you please upload attachment so that we can help, I'm not getting exactly how you are able to see local action from the modal window, If your talking about control action settings than just customize the template and it will work for your requirement.
I found that I had a 2 refreshes on a change event on one of the text boxes and those were causing the buttons to fail. I removed one of the refresh and had all the processing completed in a single data-transform. It resolved the issue, but I am still not sure why 2 refreshes one after another would cause the click on the buttons to stop working? All the other controls worked properly.
I would run with Fiddler capturing what happens when you have the double-refresh. I'm wondering if you get a "connection aborted" error after you click on the flow action because the Browser anticipates that you are refreshing the launching section, and feels that you couldn't possibly have any interest in the command going to completion. Just a hunch.