My roamio is tucked away and needs an RF signal to operate. My remote MOSTLY send RF signals (green light on top of remote) but every once in awhile will send an IR signal (red light at top of remote) which doesn't work for my setup. I have to push the buttons a few times then all of a sudden it switches back to RF. Has anyone else experienced this? I went thru the pairing process and thought it was RF only. Is there a way to turn off IR altogether?