Using Internet Explorer 11 (not a problem using Chrome) the problem manifests itself
IE 11 using Fiddler and no problem.
Using a custom PAC file with multiple PROXY statements
Proxy file or name of proxy file may change
Very slow performance with SAML
Going to a simple website can take a long time
Blue Coat Support was able to reproduce the issue. Here are some items of note:
The PAC file in use consisted of at least two PROXY statements (
"PROXY <data_center1_IP_address>:8080; PROXY <data_center2_IP_address>:8080"
;). The resolution is to either use proxy.threatpulse.net in lieu of using an IP address, or use a single IP address and one PROXY statement instead of two PROXY statements.