I have no add-ons with Revolution Slider either. Problem persists and happy you’re treating it as a bug. For the record, I’ve had other problems in the past with other sites caused by Revolution Slider. I love it when it’s working well, but I’m a little nervous about it doing stuff like this.
Like @kcreative I’d be fine letting you move my site to your own environment and experiment with it if you’d like.
Thanks,
-Dale