diff --git a/AUTHORS b/AUTHORS
index e314db297a..64488bfc62 100644
--- a/AUTHORS
+++ b/AUTHORS
@@ -80,7 +80,6 @@ Paul Kapustin <pkapustin@gmail.com>
 Peng Yu <yupeng323@gmail.com>
 Philipp Hancke <philipp.hancke@googlemail.com>
 Piasy Xu <xz4215@gmail.com>
-Qi Luo <aidenluo.me@gmail.com>
 Rafael Lopez Diez <rafalopezdiez@gmail.com>
 Ralph Giles <giles@ghostscript.com>
 Raman Budny <budnyjj@gmail.com>
diff --git a/examples/objc/AppRTCMobile/ARDAppClient.m b/examples/objc/AppRTCMobile/ARDAppClient.m
index 9d5107d33b..ccd5bb0662 100644
--- a/examples/objc/AppRTCMobile/ARDAppClient.m
+++ b/examples/objc/AppRTCMobile/ARDAppClient.m
@@ -212,11 +212,7 @@ static int const kKbpsMultiplier = 1000;
     return;
   }
   _state = state;
-  __weak ARDAppClient *weakSelf = self;
-  dispatch_async(dispatch_get_main_queue(), ^{
-    ARDAppClient *strongSelf = weakSelf;
-    [strongSelf.delegate appClient:strongSelf didChangeState:strongSelf.state];
-  });
+  [_delegate appClient:self didChangeState:_state];
 }
 
 - (void)connectToRoomWithId:(NSString *)roomId