IE11 does not send session cookie when a link targeting a new tab is clicked (on first request)

Question

I am having some trouble holding onto session when opening an initial new tab (target _blank) from IE11.

When I close all instances of IE11 and then open a fresh b

Answer 1

Not a solution, but a clue: We noticed similar behavior and tracked it down to requests to root/browserconfig.xml causing user to become unauthenticated. Server sent a new session cookie because Windows was not sending the existing one. Subsequent requests then sent the new session cookie value. We changed our server to look for this request and not set response cookies.