I'recently switched to an iPad Pro to do all my design work and was surprised to find that I cannot use it to submit my designs on merch.amazon.com. Specifically, after uploading a design, the button 'Save Selection and Continue' doesn't respond (it only changes colour from bright to dark orange, but nothing happens). I run the latest iOS 10.1.1 and have tried three different browsers (Safari, Chrome, Firefox) and the button works on none of them. It does, however, work on MS Windows and Android devices. I've contacted Apple support who checked my settings, found that everything is correct and were not able to help me further. Are you aware of this problem? Are there any solutions forthcoming? Thank you.