random redirect loop with F5 in place

Just one. A custom rule written to avoid one of the redirects.

when HTTP_REQUEST {
 if { ([string tolower [HTTP::uri]] starts_with "/dir/dir/file.aspx") and ([string tolower [HTTP::header "Referer"]] contains "login-blah.team") } {
       HTTP::redirect https://www-env.team.blah.com
 }
}

when HTTP_RESPONSE {HTTP::header insert X-UA-Compatible "IE=EmulateIE9,RequiresActiveX=true"} 

This works for a very specific redirect.