Node stream get write after end error

I'm testing stream to upload and download files, below is my realy simple file download route that unzip my compressed file and send it via stream :

app.get('/file', (req, res) => {   
   fs.createReadStream('./upload/compress_aurelien-boquet.pdf')
      .pipe(unzip)
      .pipe(res); 
});

I'm using express 4.15.2 btw.

When i try this route it works fine the first time and shows me the pdf on my browser, but if I refresh the page then my server get this error :

events.js:163
      throw er; // Unhandled 'error' event
      ^

Error: write after end
    at writeAfterEnd (_stream_writable.js:191:12)
    at Unzip.Writable.write (_stream_writable.js:238:5)
    at ReadStream.ondata (_stream_readable.js:557:20)
    at emitOne (events.js:96:13)
    at ReadStream.emit (events.js:191:7)
    at readableAddChunk (_stream_readable.js:178:18)
    at ReadStream.Readable.push (_stream_readable.js:136:10)
    at onread (fs.js:1938:12)
    at FSReqWrap.wrapper [as oncomplete] (fs.js:629:17)

I would like to know what's going on ?

via Gatsbill