Kicked/Banned users are still sending availability status sent to conference

Hi,

I have discovered that even after being kicked or banned from a conference, Spark client continues to send availability status to the conference (as long as the group chat window is not closed) :

After being kicked from "batman_0qg" conference, I am still receiving such kind of stanza from the kicked user :

<presence id="IK7JB-325"

     to="batman_0qg@conference.domain1.com"

     from="batman@domain2.com/Spark">

     <status>On the phone</status>

     <priority>0</priority>

     <show>away</show>

</presence>

This is a bit useless as this user is not present anymore in any active group chat window.

Regards,

Michel