Some screensavers, including Roku's Movie Magic, Skyline, and others include ads (or at least links) that can be launched from the Play or OK buttons on the remote.
If you have a screen saver that has ads/links, and use one of those buttons, you're launching the ad, which is usually to an app you may or may not have installed.
Use the Back (not Left Arrow, but the Back button) or Home to exit a screen saver.
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
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