Users working in the Qlik Sense HUB are prompted for credentials multiple times

This issue is seen in Qlik Sense Enterprise version April 2018.

After implementing SSO users using the Qlik Sense Hub are receiving a pop-up asking for credentials each time when opening an app. This was not happening before. 

While they are able to get to the app the multiple pop-ups asking for username and password are annoying.

Environment:
               Qlik Sense Enterprise April 2018
 

The issue has been seen in the April 2018 release after implementing a complex SSO IdP.
Prefixed virtual proxies are making calls to prefix-less default virtual proxy and results in multiple credential requests. 

It has NOT been reported in other releases. 

In the default Central virtual proxy in the QMC, add a prefix. 

NOTE: Be careful doing this, it will change how the system is accessed, for example; adding the prefix of 'win' will change the access from/to:
   FROM
https://www.<FQDN>.com/QMC
     TO
https://www.<FQDN>.com/win/QMC

-------------------------

SECOND:
The data connections for the Monitor Apps, as seen below, will also have to be updated to include the prefix else the monitor tasks will fail.

monitor_apps_REST_app
monitor_apps_REST_appobject
monitor_apps_REST_event
monitor_apps_REST_license_analyzer
monitor_apps_REST_license_login
monitor_apps_REST_license_overview
monitor_apps_REST_license_professional
monitor_apps_REST_license_user
monitor_apps_REST_task
monitor_apps_REST_user