Today I updated Symfony 4.2 to 4.3 and now I can't save entities that implement Interfaces or use traits, Mapping/PropertyMetadata class try to find a property in a interface and throw an error, my code snippet:

interface GetterIdInterface
{
  public function getId();
}

class MyEntity implements GetterIdInterface
{

    /**
     * @var string
     *
     * @ORM\Column(name="id", type="guid", nullable=false)
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="UUID")
     */
    protected $id;

    /**
     * @var string
     *
     * @ORM\Column(name="title", type="string", length=255, nullable=false)
     * @Assert\NotBlank()
     */
    protected $title;

    public function getId()
    {
        return $this->id;
    } 

    /**
     * Set title.
     *
     * @param string $title
     *
     * @return MyEntity
     */
    public function setTitle($title)
    {
        $this->title = $title;

        return $this;
    }

    /**
     * Get title.
     *
     * @return string
     */
    public function getTitle()
    {
        return $this->title;
    } 
 
}

//When I try to save MyEntity throw an exception:
...
$entity = new MyEntity();
$em->persist($entity);
$em->flush();
...

Property "title" does not exist in class "GetterIdInterface"

Symfony\Component\Validator\Exception\ValidatorException in vendor/symfony/validator/Mapping/PropertyMetadata.php (line 40)
 /* @throws ValidatorException     */    
public function __construct(string $class, string $name)    
{        
    if (!property_exists($class, $name)) {            
        throw new ValidatorException(sprintf('Property "%s" does not exist in class "%s"', $name, $class));        
    }        
    parent::__construct($class, $name, $name);    
}

any idea?

Is this issue related to #31715?

I don't know if it's exactly the same, because I can save all my entities if they not implement an Interface o use Traits...
At the end maybe is the same issue.

I copy and paste here for clarity and more context, my (closed) issue (#31873):

Symfony version(s) affected: 4.3.0

Description
In one of my forms I receive this error:

Property "domain" does not exist in class "App\Entity\MyEntity"

Obviously it doesn't exist as the property is actually $domains.

So I have a method addDomain and a method removeDomain.

The problem is caused by the validation auto_mapping: if I disable it, the problem disappears

framework:
    validation:
        email_validation_mode: html5

        # Enables validator auto-mapping support.
        # For instance, basic validation constraints will be inferred from Doctrine's metadata.
        #auto_mapping:
        #    App\Entity\: []

The PropertyInfo causes a lot of troubles: it tries to guess properties starting from methods: this causes a lot of strange behaviors. Not strictly related to this, this is another example: php-translation/symfony-bundle#309

I can confirm this, here is a simple reproducer: https://github.com/weaverryan/symfony-automapper-reproducer - you can see the simple steps in the history:

1. install validator & property-info
2. Create a public setter method in src/Entity without a corresponding property
3. Try to validate it (e.g. go to / in the reproducer):

Perfect, now works!
Thank you!