the following code worked within symfony 2.8 (patch action), after updating to symfony 3.2 i always get into the if statement, even if there are no errors. calling the validator myself, would tell everything is fine.

$form = $this->createForm(UserType::USER_UPDATE, $user);
$form->submit($request->request->all(), false);
if (false === $form->isValid()) {
    ....
}

Do i missed a change, that does not throw an exception, but ends in this strange behavior?

I already refactored the createForm to:

$form = $this->createForm(UserUpdateType::class, $user);