Second Ws Server on the same node server cause Error

[Binau]

When i create a second WS server for my node server, the first connection is closed at the connection and an error thrown.
this problem dont exist with ws v1.4 but exist with v2.x
simple exemple :

const ws = require("ws");
const http = require("http");
// Node Server
let httpServ = http.createServer();
// First Ws server
let wss1 = new ws.Server({ server: httpServ , path: '/test1/a' });
wss1.addListener('connection', (ws) => {
    console.log('CO1');
    ws.on('close', () => console.log('CL1'));
});
// Second Ws server
let wss2 = new ws.Server({ server: httpServ , path: '/test2/b' });
// listen
httpServ .listen(8080, () => {
    // make connection for first
    let wsClient = new ws(`ws://localhost:8080/test1/a`);

});

error :

Error: FIN must be set
at Receiver.getInfo (...\node_modules\ws\lib\Receiver.js:216:20)
at Receiver.startLoop (...\node_modules\ws\lib\Receiver.js:149:16)
at Receiver.add (...\node_modules\ws\lib\Receiver.js:135:10)
at Socket._ultron.on (...\node_modules\ws\lib\WebSocket.js:141:22)
at emitOne (events.js:96:13)
at Socket.emit (events.js:189:7)
at Socket.Readable.read (_stream_readable.js:381:10)
at flow (stream_readable.js:761:34)
at resume (_stream_readable.js:743:3)
at _combinedTickCallback (internal/process/next_tick.js:74:11)

i use node v7.5.0

[lpinca]

See #885.

[Binau]

thx !