I am having the same issue. Yesterday, I watched a rented movie on my Roku device from the Apple tv app. There was no voiceover at that time.
This morning, there is now a narrator that began once the movie started I cannot turn off! I’ve tried the the 4 quick pushes of the options buttons, I have went into roku and the Apple tv app and set audio descriptions to “off”, but there is no change!!
This is beyond annoying and I need help silcencing the Lesley Stahl-sounding narrator!
Does the issue only occur within Apple TV app or across other channels installed on your Roku device?
If you haven't tried yet, you can remove the affected channel then re-install it. To ensure the process is successful, make sure to restart your device before adding the channel back in. We would recommend doing this from the Settings menu by navigating to Settings > System > System restart > Restart.