Ok, so after finally getting the time to upgrade the firewall (PA-220) the problem is resolved, it seems to be fixed in version 10.1.5-h2 at least for me, TAC recommended disabling IPv6 Firewalling but this did not solve the problem, there were no other suggestions as to how to workaround it, looking back over this thread it appears that for some it worked when certain time frames were used and others when they upgraded to 10.1.5, so give 10.1.5-h2 a try and hopefully it will resolve the issue.
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