Ok, So please tell me there's a way to disable the recommendation pop up ads. They are annoying and pop up at weird times with no relevant information that I care about. It also will pop up even if I am on a different input playing my PS4. This is getting me extremely aggravated since I didn't pay the money I did for a roku stick to bombard me with adds. that pop up during movies. Especially if they don't have information I care about. If there's not a way to turn this off. I'll just go back to my firestick. It is't as good as the roku. But I don't get random pop up ads.
Tv isn't hooked up to the internet. I actually don't like the "smart" aspect of my tv. So I don't use it. and It has only done this with the Roku. it didn't do it when I did use the smart part of it nor when I had a firestick.
There is no way for a Roku (or other device for that matter) to put anything on your screen when your tv is set to display a different input. There has to be something else going on. What make and model of tv are you using?
Roku Streaming Stick +, 3810X, Ser YH0059427035, wifi - Samsung UN55ES6100
Roku Streaming Stick, 3600X, Ser 5S56D8240827, wifi - JVC EM37T
You said you don't use the smart features on the TV, but is it connected to the Internet? Odds are, some update enabled ads and recommendations. You will need to go through it's settings to see if they can be turned off.
As noted, there is no way the Roku can cause popups on another input. It has to be the TV itself. You need to go through the settings and make sure it didn't somehow connect itself to a WiFi network. I wouldn't be surprised if they could use open networks like xfinitywifi to use a special account for access. In addition to checking if there is any Internet connection, look for options to disable recommendations.