Symfony version(s) affected: 4.3.0

Description
I just upgraded my application to 4.3.0 and saw this bug.
We have a UserAddress entity:

/**
 * @ORM\Table(name="user_address")
 */
class UserAddress
{
    /**
     * @var Address
     *
     * @ORM\Embedded(class="Address")
     */
    private $address;

    // ...
}

with an embedded object Address:

/**
 * @ORM\Embeddable
 */
class Address
{
    /**
     * @var null|string
     *
     * @ORM\Column(name="first_name", type="string", length=255, nullable=true)
     */
    private $firstName;

    // ...
}

With new Doctrine auto-validation feature, it tries to access address.firstName property, but in https://github.com/symfony/symfony/blob/4.4/src/Symfony/Component/Validator/Mapping/PropertyMetadata.php#L39, we check if given property exists as it's given, so it can't work.

Possible Solution
Use symfony/property-accessor ? Instead of reflection metadata which does not contains embedded objects metadata.