I have a Hisense Roku enabled tv. I have always used the TV Input tool to scan for off air channels. Recently it has been a pretty regular thing, since for some reason, Roku Live often doesn't populate (?) the Antenna Channel guide, which it used to do, and did do after a scan. Now, after installing the Streaming Stick to try to solve the kick out of programming problems, No Antenna Channels and NO TV Input Tool in Settings or Advanced Settings or anywhere else.
Late last night, for chuckles, I took the old, unsynched remote to see if it would still work. To my complete amazement, it not only worked, but all my antenna channels are visible, my Favorites and Recents have reappeared, and I find TV Inputs when I look. Wow.
I suggest that anyone trying to improve performance by installing a Roku streaming stick NOT synch their old remote, just do the new one, So far this is working for me.
In view of the utterly dismal customer service I had and see documented in this forum, I will be limiting the total expense of system upgrade devices to one half the cost of the television. When the tv seems to be expensively obsolete, I will buy something else and consider other options than Roku devices,