Ajax events invoked twice

[Ilya Naryzhnyy]

Hello,

I have found strange Wicket behavior (8.11): ajax events being executed
twice. The same event leads to 2 invocations to a server. Here is Wicket
debug console logs (AjaxFormComponentUpdatingBehavior set for unfocus):

INFO: focus set on firstName78
INFO: focus removed from firstName78
INFO:
Channel '0' is busy - scheduling the callback to be executed when the
previous request finish.
INFO: Received ajax response (367 characters)
INFO:
<?xml version="1.0" encoding="UTF-8"?><ajax-response><component
id="feedbacks87" ><![CDATA[<div id="feedbacks87">

    <div role="alert" class="alert alert-danger">
      <div>&#039;firstName&#039; is required.</div>
    </div>

</div>]]></component><evaluate><![CDATA[(function(){Wicket.Focus.setFocusOnId('feedbacks87');})();]]></evaluate></ajax-response>
INFO: focus set on feedbacks87 from server side
INFO: Response processed successfully.
INFO: Calling focus on feedbacks87
INFO: Calling postponed function...
INFO: Received ajax response (367 characters)
INFO:
<?xml version="1.0" encoding="UTF-8"?><ajax-response><component
id="feedbacks87" ><![CDATA[<div id="feedbacks87">

    <div role="alert" class="alert alert-danger">
      <div>&#039;firstName&#039; is required.</div>
    </div>

</div>]]></component><evaluate><![CDATA[(function(){Wicket.Focus.setFocusOnId('feedbacks87');})();]]></evaluate></ajax-response>
INFO: returned focused element: [object HTMLDivElement]
INFO: returned focused element: [object HTMLDivElement]
INFO: focus set on feedbacks87 from server side

  It looks like "busy" Channel 0 is causing somehow. But, btw, nothing is
happening during this time: so no idea why Channel 0 might be busy.

Do you have any ideas?

Thanks,

Ilia
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