I currently have a different issue with my shadow play where it will be working perfectly fine and then stop working ie the icons will disappear. You go into 'share' on geforce experience and everything is turned on, you turn it off and then back on and then its still not working. I have tried uninstalling geforce experience and my graphics card drivers but that hasn't stopped the issue from happened. Only a restart resolves the issue and if I try restarting the Nvidia services in Windows that doesn't resolve the issue either.
Seems to be an issue with the latest update to my graphics card drivers/geforce experience. Unfortunately I am now having to use PlaysTV instead - it's good but I get less frame drops with using shadow play and its a more robust solution for me.