Selecting a multi variant in the product catalog, redirects to the product card

[GwB]

Greetings.
There was a problem after installing the demo portal with demo data. On the category page, if you select a product property, it takes you to the product card. I need to repeat the logic as in the demo (http://demo.virtuemart.net/product-variants). That is, when selecting, it just updates the data.

No errors in the browser console, I can't find something in the component settings that would be responsible for this behavior. Downloaded the latest version of Joomla 3.9.24 with VirtueMart 3.8

[GJC Web Design]

the page reload is by ajax so I assume JS error ... without life site no one can help

[GwB]

the page reload is by ajax so I assume JS error ... without life site no one can help

it's local develop

in console all clear, i check it
in config

[GwB]

And answer, it's option "Use ajax in browse view" in custom fields. By default, off, after activation all work normal