Hi,
I do not see any bug or a case with similar issue. It could be specific to one machine on which the client is installed. Is it possible to fresh install the OS on the PC and check if the issue persists? If that's not an option you may capture the Jabber problem report as per the steps outlined in the following doc and contact TAC
http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/jabber-windows/116334-trouble-jabber-problem-00.html
Manish
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