I had to deactivate it and come up with an alternate solution due to a press release yesterday. Here is another site where I am having the same problem:
https://future-husband.com/releases/volume-2/
The image on the left is intended to open as a colorbox overlay with several pages from the zine. I’d like to continue using colorbox, but since we’re considering a redesign anyway, if I can’t isolate the problem soon, I’m inclined to drop it altogether.
Here is a page under construction that is using the plugin with no problems:
https://marthahipley.com/dinohoodies/?page_id=14