Hi there – okay so to explain….
1. First product shows sticky column breaks when there is any ajax event on the page (on right column) so it forgets its sticky and starts to move with the right hand content, especially when its about half way down the page scroll. The column should stick until it reaches the Add to cart button/lower meta details.
2. Second example does not have the same issue – but notice when it gets to bottom it is not releasing the left hand column to scroll with the contents. Instead the lower section overlaps as it scrolls and kinda looks like a Z Index issue in a way.
I need to keep the Single Proudct Page Builder Template – so switching back to standard is not an option. Also the lower Description content – notice it is full width – I need to make this section inherit the page width – or allow control of margin/padding. At the moment this does not look good.