Two columns mobile view

-- HikaShop version -- : 6.4.1
-- Joomla version -- : 6.1.1
-- PHP version -- : 8.3
-- Browser(s) name and version -- : All
-- Error-message(debug-mod must be tuned on) -- : None

Good day, Hikashop team.

With the latest Hikashop updates, I've lost the two-column for mobile view.

I used this CSS code before, but it's no longer working:
---
@media only screen and (max-width: 600px) {
.hikashop_products_listing .hikashop_product {
width: 49%;}
}
---

I hope you can help me.
Best regards.