Can't override FOSUserBundle Registration controller when using PUGXMultiUserBundle

[Goldengrahams]

During registration, I have to check the result of an unmapped field after submitting the form and update the user accordingly. It works fine when I add the code in FOS\UserBundle\Controller\RegistrationController but not when I put it in my own controller that I created to override FOSUserBundle's controller (the controller worked fine before I started using PUGXMultiUserBundle)

Is there any way to override the controller when using this bundle?