Shuffle seems to use the same algorithm. I started a shuffle of a bookmark with 536 albums in it. (Edit: probably more like a couple of hundred because there are duplicates between my local library and Tidal/Qobuz.)
In the first hour, it played five songs by the Beatles (three from the same album), and three by James Brown. Roughly half the selections played were by two artists. There are hundreds of artists in the bookmark.
The thumbs up/down dialogue pops up every now and then, too, as if it’s playing radio instead of bookmark shuffle.
Edit: Oh, cool, there’s the Beatles again, as I’m typing. At least it’s from a different album.