Thanks to the fantastic GF support team, I was able to create a form with conditional logic and images for several radio field options (see the post here).
Everything was smooth sailing until earlier today when I was showing someone else the form on my iPad, and could not make a selection for any radio fields that use images. Tried to inspect with Adobe Shadow but having connectivity issues to debug - so far not a good start to my Saturday.
The form can be viewed here. I have a mobile switcher in place for phones but not for tablets (if on a phone, just tap the "View Desktop Version" on one of the interior pages for the full site).
Thanks in advance for any thoughts or suggestions!