Help & troubleshooting for channels on your Roku device, including adding/removing channels, logging in to, authenticating, or activating a channel, channel-specific playback issues, assistance contacting channel publishers to report issues, and adjusting channel-specific settings.
You may be doing this yourself. If you are using one of the scrolling screen savers that includes links to various channels, exiting the screen saver by pressing OK or the Play/Pause key on your remote may cause a channel to be installed. Changing to a screensaver without these links can eliminate this possibility.
Another thing to consider, if you have more than one Roku device connected to your Roku account, a channel added/removed on one Roku is added/removed on all.
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Roku Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X | Roku Streaming Stick 3600