Not sure what is going on, but the stupid Roku Channel movie Jingle Bell Love keeps auto playing on my Roku. I have a Roku Ultra 4800X. What's really annoying is I can be in my Blu-ray player or on the home screen of my Samsung TV using their remotes (not Roku remote) and the screen will blink, then goes into installing Roku Channel, and then starts playing Jingle Bell Love movie. For all intents and purposes, this problem has made my overall home theater system unusable. I'm at the point that if I can't fix this I'm going to have to dump the Roku completely. I will also add this only started after this movie started having a link icon and Roku play/pause button displayed in lower left hand corner of Roku home screen. Makes me wonder if any remote (Roku, Samsung TV, Panasonic Blu-ray) usage causes the Roku to think I am clicking the play button for the movie on the Roku home screen.
Very likely (your remote suspicion).
Users frequently report issues similar to this (content playing, channels/app being automatically installed) whenever the lower left ad is displayed on the Home Screen.
Doesn't happen to everyone so likely something in the setup is causing the Roku to sense the Play/Pause button has been pressed.
The lower left ad is not nornmally always present though (will come and go with different promotions), although unfortunately with the holidays, this ad is likely to be more present for a while.
Maybe try placing something in front of the 4800, or hide it behind the tv and see if that helps with some errant IR signals it may be receiving. (when hidden, your 4800 will communicate with the Roku remote via RF/wifi direct so does not need to be visible/have line of sight).
It's possible I just solved my own problem. It appears the smart remote for my Samsung TV was set up as a universal remote for the Roku and Blu-ray player. Apparently the issue is with the Samsung Smart remote that when in universal mode for some reason will act as a 'play' button on all devices it is linked to as an universal remote. Never had an issue with it until Roku put the **bleep** Jingle Bell Love movie icon on the Roku home screen with the built in Press Play button. Stopped having issue once I turned off universal remote mode on Samsung remote. But Roku needs to dump the Press Play button on home screen icons as that is going to be an issue with folk using universal remote modes on other remotes.