I've complained about this several times in various different remote topics. The design decision of putting the volume and mute buttons on the right side of the remote is insanely idiotic! Whoever came up with this idea has zero common sense and should be fired. Everyone else who approved this terrible design should also be terminated because they are even dumber for doing so!
It's so easy to accidentally press those buttons just by reaching to pick up the remote or by simply holding it in your hand while trying to press the buttons on the top of the remote. There was absolutely no need for the buttons to be placed on the right side of the remote when the top of the remote absolutely has enough space for them.
If you look at the Fire TV device remotes they have those volume and mute buttons on the top of the remote and those remotes are about the same size as the Roku remotes and they also include the present channel shortcut buttons. So if Amazon can design these volume control buttons to fit on the top of their remotes then why can't Roku do the same thing for their remotes?
If you look at the bottom of the Roku remotes there are several inches of empty space, the channel shortcut buttons could easily have been moved down lower into that empty area which would free up more space above them for the volume and mute buttons to be placed. Now that is basic common sense that was not taken into consideration by the people who designed the Roku remotes.
It never ceases to amaze me how "smart people" who design stuff lack absolute basic common sense that any other person has. It's like Roku didn't even bother to test these remotes with users to get feedback before approving the final design, because if they had I'm sure there would have been many people who would have complained about these buttons being on the right side of the remote and causing inadvertent button presses.
Roku has so many problems with their remotes, just look at all the topics created here about them and these volume buttons are one of their issues. I've said this many times, the Roku remotes are flawed technology and they need a complete redesign, but Roku keeps on making the same ones, it's very frustrating.