How this problem happens? If you first create class named slide for a div or text - and change the display to block - than add this class to slideX - you overwrite the core styles (This is how users create custom max-width container for example). Keep this idea in mind.
Can I buy you some beer or reward you with something? Seriously… we launched the site on Monday and realized after-the-fact the mobile slides were not appearing as expected. I’ve been banging my head on the keyboard all week trying to figure this out! If there’s a way for you to DM me, please do. I’d be delighted to compensate you.