Keep Me Logged In tick-box not working in Customer Portal

Summary

Keep Me Logged In tick-box not working in Customer Portal

Steps to Reproduce

1. Log in to Customer portal with "Keep me logged in" Tickbox is ticked.
2. Perform some actions in portal.
3. Close down browser.
4. Open the browser back.
5. Navigate to portal.

Expected Result

• Is Still logged in to portal even after browser restart.

Actual Result

• Still get prompted to log in.

Notes

• Tested in IE11, Firefox and Chrome