serialization of a badly formed adress field (in a rest API context) result in an error

Hi,
So is setup a rest API with core's REST modules and users with adresses field.
using the endpoint POST /entity/user?_format=json

one of my client sent a badly formed json such as (lacking the array around the adress field):

{
    "name": [
        {
            "value": "XXX@gmail.com"
        }
    ],
    "mail": 
        {
            "value": "XXX@gmail.com"
        }
    ,
    "pass": [
        {
            "value": "XXXXXXXX",
            "pre_hashed": false
        }
    ],
    "status": [
        {
            "value": true
        }
    ],
    "field_adresse": 
        {
            "langcode": "",
            "country_code": "FR",
            "administrative_area": null,
            "locality": "Paris",
            "dependent_locality": null,
            "postal_code": "75012",
            "sorting_code": null,
            "address_line1": "7 rue des testeurs",
            "address_line2": null,
            "organization": null,
            "given_name": "Unintest",
            "additional_name": null,
            "family_name": "Testeur43"
        }
    
}

He got a status 500500 Service unavailable (with message)

The website encountered an unexpected error. Please try again later.
Error: Call to a
member function getClass() on null in
Drupal\serialization\Normalizer\FieldItemNormalizer->constructValue() (line
242 of
core/modules/serialization/src/Normalizer/FieldableEntityNormalizerTrait.php).

Drupal\serialization\Normalizer\FieldItemNormalizer->constructValue('', Array) (Line: 38)
Drupal\serialization\Normalizer\FieldItemNormalizer->denormalize('', 'Drupal\address\Plugin\Field\FieldType\AddressItem', 'json', Array) (Line: 182)
Symfony\Component\Serializer\Serializer->denormalize('', 'Drupal\address\Plugin\Field\FieldType\AddressItem', 'json', Array) (Line: 52)
Drupal\serialization\Normalizer\FieldNormalizer->denormalize(Array, 'Drupal\address\Plugin\Field\FieldType\AddressFieldItemList', 'json', Array) (Line: 182)
Symfony\Component\Serializer\Serializer->denormalize(Array, 'Drupal\address\Plugin\Field\FieldType\AddressFieldItemList', 'json', Array) (Line: 151)
Drupal\serialization\Normalizer\EntityNormalizer->denormalizeFieldData(Array, Object, 'json', Array) (Line: 72)
Drupal\serialization\Normalizer\EntityNormalizer->denormalize(Array, 'Drupal\user\Entity\User', 'json', Array) (Line: 182)
Symfony\Component\Serializer\Serializer->denormalize(Array, 'Drupal\user\Entity\User', 'json', Array) (Line: 196)
Drupal\rest\RequestHandler->deserialize(Object, Object, Object) (Line: 79)
Drupal\rest\RequestHandler->handle(Object, Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 573)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 151)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 68)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 52)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 708)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Expected:
a status 422Unprocessable Entity with an appropriate error message

It might be an issue with core's serialization but since it works with other fields types i post it here,
sorry if I am wrong