Header slideshow not appearing on some pages

Hi, I’ve used this plugin on many different blogs with no trouble at all, however on the following site https://www.therockingchair.co.uk/blog/ once you navigate away from the main page the header fails to display correctly.

Having searched for a solution all I found was that an upgrade to 1.1 would fix this problem but I am already using 1.1, any help would be greatly appreciated.

Thanks!

https://www.ads-software.com/extend/plugins/header-slideshow/