I’m using Parallax Pro as well.
When you’re trying to recreate the problem don’t forget that it was working 100% normally for months. The gallery in question on my site works normally on a page, just not in a widget on the home page. Or not anymore anyway. Like I said, it used to work.
My website is supposed to launch this coming weekend and it was finished and ready to go until this happened.I really hope it comes back ??