Cannot remove item from cart

Hello !

WP version 5.5.3
WooCommerce Version 4.9.2
StorefrontVersion : 3.4.0
Tested on Chrome and Firefox

– Add an item to the cart
– Go to the cart page
– Remove the item with the circled cross button (only a GET on https://www.[myWebsite]?remove_item=%5BitemId%5D is fired)
-> The page load but nothing change, refreshing the page is not helping

The item can be removed by setting the amount to 0 or by clicking the circled cross button but from the menu (here a POST on https://www.[myWebsite]?wc-ajax=remove_from_cart is fired).

Updating the theme and disabling the “Set expires header”/adding the page exceptions is not helping either. (https://themeskills.com/fix-problem-with-removing-items-from-woocommerce-cart/)

The website with the issue is protected by a login/password so I wont be able to give you the link.

Thanks !