'down' event not firing when other service shutdown

[826327700]

import Bonjour from 'bonjour-service'

const instance = new Bonjour()

// advertise an HTTP server on port 3000
instance.publish({ name: 'My Web Server', type: 'http', port: 3000 })

// browse for all http services
let browser =instance.find({ type: 'http' })

browser.on('up', function (service) {
  console.log('server up:', service)
})

browser.on('down', function (service) { <---- It doesn't work when other service shutdown
  console.log('server down:', service)
})