How to add role on user during the session

I just updated Symfony 4.3 to 4.4 and since, when I modify the role of my user after my login page, this one is disconnected

Before I did this in my controller:

$this->getUser()->setRoles(['ROLE_MODERATEUR']);

Everything went well, there was no disconnection.

But since version 4.4, the user systematically loses his session.

Does anyone have a solution to bring me to resolve my concerns?

Thank you in advance.