Hi @xlust ,
Our plugin doesn’t trigger page reloading after pressing the Add to Cart button on the Quick View popup. You can test our live demo here to confirm that: https://demo.wpclever.net/woosq/.
It might be that the Add to cart button on your site is manipulated by another plugin or the theme elements so the page/cart will need to be refreshed everytime a product is added to the cart. You might want to disable all plugins except WooCommerce and our plugin to check, then reactivate one by one to find the culprit.
If your site is using AJAX for the add to cart button, you might want to use this plugin for further assistance: https://www.ads-software.com/plugins/wpc-ajax-add-to-cart/
Best regards.