If the Zscaler App is not updating for some users, even if you've enabled auto-update or have pushed an update, you must deploy Zscaler App 1.1.4 (via Active Directory or the MDM of your choice) to resolve the issue. In the Zscaler App portal, you can check which devices are running outdated versions of the app.
In the Zscaler App portal, on the Dashboard page, you can check which devices have outdated versions of the app by using the Device Policy Status widget.
Also, if you go to Enrolled Devices, then select Device Overview from the menu on the left, you can do the following:
If you see devices that have not been updated, you must manually deploy the Zscaler App again to your users (via Active Directory or the MDM of your choice). This ensures that Zscaler App 1.1.4 is properly installed on user devices.