The shopping cart and checkout page work correctly only after the page is refreshed. How to be?

Question

JavaScript

Hello everyone, please help me figure out what the problem is. Website: https://edelveystex.ru/ opencart 3, so-emarket theme. When adding a product to the cart, a modal window pops up informing that the product has been added, but writes the wrong amount, plus the wrong amount also flies to the cart, as it was on the checkout page ordered. But after refreshing the page, in the cart and on the checkout page everything becomes ok