We have recently tested a course with different publishing settings (we are using Storyline 360) to see how it works in HTML5. The options that rely in HTML5 (HTML5 only or HTML5 with Flash backup) are not working in Edge, IE (a grey screen with a loader is shown) and Opera.
We have tried it both in our LMS and in Scorm Cloud, with same result.
Is this a common issue?
Unfortunately, we cannot share this course right now, but if needed we can try to produce a public access version.