I tried looking through the slide show this morning from my home computer and I had the same issue of not being able to click forward through the slides. I never even got to see the pink one. And if I left it alone to go on its own, it didn't transition through all the slides.
Also, when I kept clicking forward - either fast or slow, the identification of the images changed but the images didn't move forward, so if you hovered over the image on the screen, you got the identification of the fabric two or more slides ahead. It's always worked like this and maybe it's time to look into it.
Or when doing nothing but watching the slide show, the dots advance and the images don't.
I'm using Firefox - as far as I know it's current. It shows a few frames and then stops. The dots progress across the screen, along with the fabric tags, but the image remains frozen in place - whichever image it decides to stop on. I have the problem at home as well as on the work computer.