Problem with Preview and Publish in CP 2017
I started a simple project; one slide with a bit of text and 32 image buttons with some custom states. When I try to Preview all I see is this flickering popup:

When I preview HTML5 in browser I do see the slide with all its content. But if I view the published content, I again only see a blank slide. Has anyone encountered this and knows of a solution?
I tried creating a new project and paste the objects, without success. And I deleted groups of buttons. Turns out that having more than 12 buttons cause the issue described above.
