TV antenna rescan resets all the streaming channels too.

I agree completely - losing all of the "Hide/Favorites" selections from a channel re-scan is a royal PITA, and a basic system useability design oversight in serious need of attention.

Unfortunately, the history of Roku not listening to customer complaints on such fundamental, obvious useability issues makes the chances of this ever being addressed pretty slim-to-none. 😕 Very disappointing.