Critical Bug in Iyzipay Drupal Module: Payment Not Processed

The module has a major bug that prevents it from working correctly.

Users can enter their credit card information and address, and they are redirected to Iyzipay. However, something goes wrong at that point. Even though the user enters the SMS code, the payment is not collected by Iyzipay. And then, instead of being redirected to the order confirmation page, the user is redirected to /iyzipay/3d_landing_page.