InvalidStateError: Failed to execute 'send' on 'WebSocket': Still in CONNECTING state.

InvalidStateError: Failed to execute 'send' on 'WebSocket': Still in CONNECTING state.

Hi, 
I'm see in my logs that some users receive this error generating from the salesIq code. 

Stack trace: 
InvalidStateError: Failed to execute 'send' on 'WebSocket': Still in CONNECTING state.
  at Object.$UTS.Notifier._sendData(/salesiq/Jun_20_2016_https/js/track.js:1:49586)
  at Object.$UTS.Notifier.notifyServer(/salesiq/Jun_20_2016_https/js/track.js:1:49340)
  at Object.$UTS.Notifier.acknowledge(/salesiq/Jun_20_2016_https/js/track.js:1:49202)
  at Object.handleUTSEvent(/salesiq/Jun_20_2016_https/js/track.js:1:44849)
  at Object.handleResponse(F/salesiq/Jun_20_2016_https/js/track.js:1:45251)
  at c(/salesiq/Jun_20_2016_https/js/track.js:1:54009)
  at XMLHttpRequest.b.onreadystatechange(/salesiq/Jun_20_2016_https/js/track.js:1:53333)
  at XMLHttpRequest.r(/vendor.6e141407db276a8dcaff.js:161:12339)
All errors were on Chrome v51, Windows 10

Thanks, 
Uri