Hi Leo,
When you scroll down, the image and text under the description tab show in front of the sticky navigation. I need to set the z-index for the sticky nav higher than 100 to fix the issue.
You might see what I mean a bit clearer on this product: aintnailz.ie/store/products/gel-nail-technology/
When you scroll down the sticky nav bar goes behind the content thats under the description tab.
I cleared cache on my site just in case.
Thanks again for your help,
David