don't schedule send for first SYN reply

libi2pd/Streaming.cpp

@@ -705,6 +705,7 @@ namespace stream
 
 	void Stream::SendBuffer ()
 	{
+		if (m_RemoteLeaseSet) // don't scheudle send for first SYN for incoming stream
 			ScheduleSend ();
 		auto ts = i2p::util::GetMillisecondsSinceEpoch ();
 		int numMsgs = m_WindowSize - m_SentPackets.size ();