...
Note: When testing your ICR in Preview mode, if you click a Go To Queue button you are automatically exiting preview mode and entering a live environment. Once you enter a live environment, you will not be able to return to preview mode, instead, every time you try to preview the same ICR, the Queue page will be displayed within your ICR window. To reset Preview mode, you must exit the Client Admin Portal, and clear your cache. Once your cache is cleared, log back into the Client Admin Portal, select your ICR, and click Preview, your ICR Landing Page should be displayed.
...