Fix reconnects

Author: danog

src/API.php

@@ -51,7 +51,7 @@ final class API extends AbstractAPI
      *
      * @var string
      */
-    public const RELEASE = '8.4.14';
+    public const RELEASE = '8.4.15';
     /**
      * We're not logged in.
      *

src/DataCenterConnection.php

@@ -360,7 +360,8 @@ public function signalDisconnect(int $id): void
     {
         $backup = $this->connections[$id]->backupSession();
         $list = '';
-        foreach ($backup as $k => $message) {
+        foreach ($backup as $message) {
+            $message->unlink();
             $list .= $message->constructor;
             $list .= ', ';
         }

src/MTProtoSession/Session.php

@@ -212,7 +212,6 @@ public function backupSession(): array
                 if (!$message instanceof MTProtoOutgoingMessage) {
                     break;
                 }
-                $message->unlink();
                 $pending []= $message;
             }
         }