w3total cache problem with add to cart button and complianz plugin

Dear hi,

My site is stimeno.com and i installed the w3 total cache plugin.
The site runs much faster and it is better but i have 2 problems.

First problem. When i add a product to the cart the page refreshes automatically, after the refresh every product i add it is added without refreshing the page.

I want when the customer adds the product to the cart, the page to remain and not refreshing.

The second problem is with the plugin Complianz | GDPR/CCPA Cookie Consent.
When i enter the stimeno.com the cookie banner in not showing up. If i go to another page through the stimeno.com site then the cookie banner shows up. Or if add a product to the cart, the cookie banner shows after the refreshing of the page as i told you before.

I want the banner to show immediately when the visitor comes to the site.

How can i resolve those 2 problems?

I am waiting for your response,

Yours sincerely,

Asterios Chatzikontidis