Here is an alternative theory - maybe it's the component that has the issue, not the remote?
This is what happened to me today in Roku's Google "Play Movies", so bizarre i figured i'll film it:
https://www.youtube.com/watch?v=BetjLZ8MXkwBasically the "My Movies" grid screen can get stuck infinitely scrolling, which is so weird because it seems to be a regular roGridScreen sub-type. There is no hidden remote. This all happened using the remote held, using left/right arrows made it stuck scrolling and repeat use of the arrows won't un-stuck it. The << / >> stop it but... only temporarily. It is a repeatable bug, not a one-off. WTF...