HTML 5 export breaks my project's functionality...

I have been through endless hours of very intense testing and QA for this and many other related functions and my conclusion is as follows:

Adobe has NOT perfected or is even close to a satisfactory capability of true HTML5 publishing from Adobe Captivate.

Yes the HTML5 checker will return '0' conflicts and Yes your previews will always show you what you want but when push comes to shove and it's published on a server or LMS the whole thing goes crazy.

This includes not only Drag and Drop interactions but other functions and just about ANY animation as simple as fade in/outs and even simple click boxes and playing audio for a quiz question.

Check out the difference yourself. Publish one version in SWF/HTML5 and publish the other in just SWF and prepare to come to a quick decision.

My only suggestion: Do not select HTML5 in the publishing at all. Stick to SWF and deal with it. Otherwise none of your interactions, advanced animations, functions, and things as simple as ease in and out effects will totally NOT WORK. And if you need additional confirmation, open the output file in different browsers from Internet Explorer to Chrome and pay attention to how each browser reads HTML5 in it's own DIFFERENT way.

Stay on the path of SWF for now and don't fall victim to Adobe's false comfort of publishing in HTML5. And if it's a must for mobile device purposes than DO NOT add any bells and whistles. This means just text on a screen (No animations, no audio, no type of effects... NOTHING not even quizzes) and then hope it works right. P.S. YOU CANNOT EVEN ADD A "MIRROR" EFFECT TO IMAGES AND PUBLISH TO HTML5.

Which browser did you use for testing? Is it a responsive project? Can you

mention exact version number, please?