Why retry cound does not increase upon exception thrown?

In Symfony I use a custom Serializer upon a transport:

framework:
    messenger:
        transports:
            async: '%env(MESSENGER_TRANSPORT_DSN)%'
            failed: 'doctrine://default?table_name=failed_messages'
            sqs_channel_manager:
              dsn: '%env(SQS_CHANNEL_MANAGER_TRANSPORT_DSN)%'
              serializer: AppInfrastructureMessengerChannelManagerSerializer
              options:
                  access_key: '%env(AWS_ACCESS_KEY_ID)%'
                  secret_key: '%env(AWS_SECRET_ACCESS_KEY)%'
                  region: '%env(AWS_REGION)%'
                  queue_name: '%env(CHANNEL_MANAGER_QUEUE_NAME)%'
        failure_transport: failed
        default_bus: command.bus
        buses:
            event.bus: ~
        routing:

I also made this Serializer:

declare(strict_types=1);

namespace AppInfrastructureMessenger;

use AppDomainEventChannelManagerChannelManagerEventHasReceived;
use SymfonyComponentMessengerEnvelope;
use SymfonyComponentMessengerStampBusNameStamp;
use SymfonyComponentMessengerTransportSerializationSerializerInterface;

class ChannelManagerSerializer implements SerializerInterface
{
    public function decode(array $encodedEnvelope): Envelope
    {
        $data = json_decode($encodedEnvelope['body'], true);

        if (json_last_error() !== JSON_ERROR_NONE) {
            throw new InvalidArgumentException(
                'Invalid JSON received from SQS: ' . json_last_error_msg()
            );
        }

        return (new Envelope(new ChannelManagerEventHasReceived($data)))
            ->with(new BusNameStamp('event.bus'));
    }

    public function encode(Envelope $envelope): array
    {
        $event = $envelope->getMessage();

        return [
            'body' => json_encode($event->channelManagerData, JSON_THROW_ON_ERROR),
        ];
    }
}

Then I made this handler emulating an error:

declare(strict_types=1);

namespace AppApplicationEventListener;

use AppDomainEventChannelManagerChannelManagerEventHasReceived;
use Exception;
use SymfonyComponentMessengerAttributeAsMessageHandler;

class ChannelManagerSubscriber extends BaseEventListener
{
    #[AsMessageHandler]
    public function onChannelManagerEvent(ChannelManagerEventHasReceived $event): void
    {
        throw new Exception();
        dump($event);
    }
}

But running the queue:

 php -d memory_limit=-1 bin/console messenger:consume sqs_channel_manager -vv

Does not increase the count:

12:01:20 INFO      [messenger] Received message AppDomainEventChannelManagerChannelManagerEventHasReceived ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived"]
12:01:20 WARNING   [messenger] Error thrown while handling message AppDomainEventChannelManagerChannelManagerEventHasReceived. Sending for retry #1 using 930 ms delay. Error: "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: " ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived","message_id" => null,"retryCount" => 1,"delay" => 930,"error" => "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: ","exception" => SymfonyComponentMessengerExceptionHandlerFailedException^ { …}]
12:01:21 INFO      [messenger] Received message AppDomainEventChannelManagerChannelManagerEventHasReceived ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived"]
12:01:21 WARNING   [messenger] Error thrown while handling message AppDomainEventChannelManagerChannelManagerEventHasReceived. Sending for retry #1 using 1005 ms delay. Error: "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: " ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived","message_id" => null,"retryCount" => 1,"delay" => 1005,"error" => "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: ","exception" => SymfonyComponentMessengerExceptionHandlerFailedException^ { …}]
12:01:24 INFO      [messenger] Received message AppDomainEventChannelManagerChannelManagerEventHasReceived ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived"]
12:01:24 WARNING   [messenger] Error thrown while handling message AppDomainEventChannelManagerChannelManagerEventHasReceived. Sending for retry #1 using 983 ms delay. Error: "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: " ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived","message_id" => null,"retryCount" => 1,"delay" => 983,"error" => "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: ","exception" => SymfonyComponentMessengerExceptionHandlerFailedException^ { …}]
12:01:26 INFO      [messenger] Received message AppDomainEventChannelManagerChannelManagerEventHasReceived ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived"]
12:01:26 WARNING   [messenger] Error thrown while handling message AppDomainEventChannelManagerChannelManagerEventHasReceived. Sending for retry #1 using 929 ms delay. Error: "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: " ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived","message_id" => null,"retryCount" => 1,"delay" => 929,"error" => "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: ","exception" => SymfonyComponentMessengerExceptionHandlerFailedException^ { …}]
12:01:27 INFO      [messenger] Received message AppDomainEventChannelManagerChannelManagerEventHasReceived ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived"]
12:01:27 WARNING   [messenger] Error thrown while handling message AppDomainEventChannelManagerChannelManagerEventHasReceived. Sending for retry #1 using 1023 ms delay. Error: "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: " ["class" => "AppDomainEventChannelManagerChannelManagerEventHasReceived","message_id" => null,"retryCount" => 1,"delay" => 1023,"error" => "Handling "AppDomainEventChannelManagerChannelManagerEventHasReceived" failed: ","exception" => SymfonyComponentMessengerExceptionHandlerFailedException^ { …}]

As you can see the failure causes "retryCount" => 1 and not be increased. Do you know why?