diff --git a/EventListener/SendFailedMessageToFailureTransportListener.php b/EventListener/SendFailedMessageToFailureTransportListener.php
index dda97843..40b3fff2 100644
--- a/EventListener/SendFailedMessageToFailureTransportListener.php
+++ b/EventListener/SendFailedMessageToFailureTransportListener.php
@@ -49,6 +49,11 @@ public function onMessageFailed(WorkerMessageFailedEvent $event): void
 
         $envelope = $event->getEnvelope();
 
+        // avoid re-sending to the failed sender
+        if (null !== $envelope->last(SentToFailureTransportStamp::class)) {
+            return;
+        }
+
         $envelope = $envelope->with(
             new SentToFailureTransportStamp($event->getReceiverName()),
             new DelayStamp(0),
diff --git a/Transport/Serialization/PhpSerializer.php b/Transport/Serialization/PhpSerializer.php
index f9cd992c..438fc1a1 100644
--- a/Transport/Serialization/PhpSerializer.php
+++ b/Transport/Serialization/PhpSerializer.php
@@ -81,7 +81,7 @@ private function safelyUnserialize(string $contents): Envelope
             $prevUnserializeHandler = ini_set('unserialize_callback_func', self::class.'::handleUnserializeCallback');
         }
         $prevErrorHandler = set_error_handler(function ($type, $msg, $file, $line, $context = []) use (&$prevErrorHandler) {
-            if (__FILE__ === $file) {
+            if (__FILE__ === $file && !\in_array($type, [\E_DEPRECATED, \E_USER_DEPRECATED], true)) {
                 throw new \ErrorException($msg, 0, $type, $file, $line);
             }