localhost can't receive packet when DatagramSocket immediately closed after send

[auntyellow]

		try (DatagramSocket socket = new DatagramSocket()) {
			DatagramPacket packet = new DatagramPacket(new byte[16], 16,
					new InetSocketAddress("localhost", 5514));
			socket.send(packet);
			// Thread.sleep(2); // sleep(1) doesn't work
		}

Occurs under 1.8.0_401-b10 64-bit server and Windows 7

[auntyellow]

Occurs if sent by python:

import socket, time

UDP_IP = '127.0.0.1'
UDP_PORT = 5514
MESSAGE = 'Hello'

print("UDP target IP:", UDP_IP)
print("UDP target port:", UDP_PORT)
print("message:", MESSAGE)

sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP
sock.sendto(bytes(MESSAGE, "utf-8"), (UDP_IP, UDP_PORT))

# time.sleep(1e-20) # 1e-20 is enough to send out