That indicates a stuck button on your remote. You can verify that by using a digital camera (like the one on your phone that you hate). If you point the remote at the camera you can see the flash of light that occurs when you press a button. Yours is probably flashing when you're not touching a button. You can try strumming the buttons to see if you can get it unstuck or used compressed air to blow out any contaminates. You could also take it apart to clean it, but that's a real pain. There are cheap universal remotes that can control a Roku.
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