Notification add to cart will not appear – please help

Hello,

I do not know why, but I did not see any notifications about adding the product to my cart.

When I click on the button to add a shopping cart below the product, nothing will appear.

But when I switch to the detail of any product or switch to a shopping cart, the green notification for the added product in the shopping cart, including the orange button for instant switching into the shopping cart, appears mysteriously at the top. (If I added different products before switching to the cart, the alert will appear several times below.)

I use the GeneratePress (Jigoshop) template, but that’s probably not a problem. When I change a theme, it behaves quite the same.

Please advise.

Thank you.