When browsing the internet with IE v11.0.9600.19100, users are being redirected to the proxy FQDN virtual URL.
This happens when in Transparent proxy using "origin-cookie-redirect" authentication mode.
Other browsers still work correctly.
Refreshing the address bar URL may allow the page to finally load completely.
This is being caused by a bug that affects the redirects on that IE version, as described by Microsoft:
In order to resolve this, apply update KB 4459022.
This update is available through Microsoft Update. When you turn on automatic updating, this update will be downloaded and installed automatically.
For more information about how to get security updates automatically, see Windows Update: FAQ.
Note For Windows RT and Windows RT 8.1, this update is available through Microsoft Update only.
To get the stand-alone package for this update, go to the Microsoft Update Catalog website.