Hi,
I wonder if it is telling you that there is a new remote control device being detected and would you like to use it.
Here is a link to the User Guide, scroll to p.21 to see if you have set up your Apple TV to only work with the supplied remote.
https://manuals.info.apple.com/MANUALS/1...
Here is a link describing how to use other devices to control your Apple TV. Scroll down to find info regarding 3rd Gen Apple TV remote setup procedure to see if it has been setup to use other remotes
https://support.apple.com/en-au/HT201664
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