Are open parentheses a way to mention featured artists?

I recently found the “guess featured artist from title” function and use it a lot since.
Usually it works quite well, but today I found an odd behavior:
A remix was missing a closing bracket - “Song (xy remix” - and instead of leaving this in the song title the function added “xy remix” as a featured artist.
Is this a bug in the guess function or is “Song (featured artist” another (bad) way to credit features used sometimes?

Huh. I’ve never seen this used, I think it’s unintentional.

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