Problem With Prestashop 1.5.3.1 And Paypal 3.4.5

[Supermanzo]

Hi,

I'm using Prestashop 1.5.3.1 and PayPal module 3.4.5 and I have the following problem:

If you choose to pay with PayPal at the normal checkout page but then after being redirected at the PayPal's login form decide to abort the sale and go back to the shop's website using the browser back button or simply by retyping the shop's url WITHOUT instead clicking on the "cancel" button on the PayPal's login form; every time you'll try to pay again by clicking on the "Terms and Condition" checkbox you'll be redirected to the "Order Summary" page showed in the first photo.

If you try to confirm the order from this "Order Summary" page, you'll be redirected to the "error page" in the second photo.

If you don't confirm anything and want to go back and change payment method, you'll not be able to do so and you'll be stuck in the same "Order Summary" page from the first photo as soon as you click the "Terms and Conditions" checkbox. The only way to exit from this loop is by deleting your browser cookies. This is not happening on our live 1.4.9.0 Prestashop install with PayPal 3.3 Module.