Yesterday I upgraded from WebSite X5 2021 to 2026 (simply because I want the facility to use SVG images in the future.  However, in converting one of my websites to the new version it has created a problem when viewing it on my old iPad (1024x768).  This picks up the first responsive break on the site.

On my test host:

The old 2021 site www.displaymysite.com/short
works fine

The new 2026 converted site www.displaymysite.com/123 
has a corrupted header section,and the Jessor slider as the first item on the welcome page does not display

I have spent many hours trying to discover the problem, and it only occurs on the old iPad. 

Can anyone help please?