diff --git a/netwerk/protocol/http/Http3Session.cpp b/netwerk/protocol/http/Http3Session.cpp
index 495f296dd761..083ad41f18db 100644
--- a/netwerk/protocol/http/Http3Session.cpp
+++ b/netwerk/protocol/http/Http3Session.cpp
@@ -1582,10 +1582,13 @@ void Http3Session::Authenticated(int32_t aError) {
            static_cast<uint32_t>(mError), this));
     }
     mHttp3Connection->PeerAuthenticated(aError);
-  }
 
-  if (mConnection) {
-    Unused << mConnection->ResumeSend();
+    // Call OnQuicTimeoutExpired to properly process neqo events and outputs.
+    // We call OnQuicTimeoutExpired instead of ProcessOutputAndEvents, because
+    // HttpConnectionUDP must close this session in case of an error.
+    NS_DispatchToCurrentThread(NewRunnableMethod(
+        "net::HttpConnectionUDP::OnQuicTimeoutExpired", mSegmentReaderWriter,
+        &HttpConnectionUDP::OnQuicTimeoutExpired));
   }
 }