Hi,
I've got nothing to add really. As you can see in my screenshots and tests, the issue can only come from some kind of caching.
Caching can be done in a lot of ways. For example :
- some kind of CDN on the network of the server
- a caching software on the server
- a caching extension on the website
- the caching settings of Joomla
- the caching plugin of Joomla
That's all I can think of. But there is nothing which can create that problem in HikaShop, so not much we can do to help.
If you try on another hosting or on a local web server on your computer, you should not have the problem.