Re: roku mobile app won't recognize one of my devices **FIXED, I think**
I am glad it worked for you. Your TV's Roku app is acting like a typical computer application. Sometimes when changes are made it needs to be rebooted to have those changes be recognized by your network devices. Word of caution though... you may have to do this periodically because sometimes the app on your phone will forget it's settings, but at least now you know how to restore it.