I have the same situation with my LG TV. I can find no other solution than pressing the button that you've programmed to switch HDMI inputs. As you write it is only an additional button but is, I agree, nonetheless frustrating. I have also found the build quality of the U1 to be very poor. the remote buttons gradually stopped working until they finally died, afte ronly 6 months. i have requested an replacement unit but to no avail. If there was a viable alternative I would happily purchase it