Radio Buttons?— Validation for ‘Other’ option not working

Awesome plugin, thanks!

I have a form that contains radio button fields. I have enabled the Gravity Forms’ “other” option to allow the user to type an answer. When the user clicks on the “other” option to input their answer, no real-time validation occurs. All other radio buttons work correctly, but not the “other” option. How can I enable real-time validation for this option?

Thanks,
Sergio