My Verizon Fios remote will close the Roku Express feed when the A/V button is pressed and it returns to regular TV. However, when the channel button is changed on the Fios remote Roku is activated and the Roku Home Screen appears. I cannot stop the Fios remote from activating the Roku stick.
Try turning off 1-touch play on the Roku (Under Home->Settings->System->Control other devices).
Thank you so much for the response. It worked perfectly. Problem solved!