Hi,
On our site’s shop page, sorting works but, when select a sort option, products appear in a wrong order and then goes blank and appears in the correct order.
You can see it on the URL shared below.
Kindly check if possible.
Thanks..
Please make the full backup of your site and check the issue on the Storefront theme to detect if our theme causes the problem. Storefront is a free theme developed by WooСommerce.