A total of 3 reviews of this product on Reddit.
I got one of these moon lamps for Christmas a few years ago (I asked for it lol).
Mine is an older one as it didn’t change into more than one color but it was amazing and worked really good until I guess the power went out one too many times and eventually the magnet busted out from the bottom. I need to try to reglue it but that magnet is strong so I’m scared it’ll do the same thing.
Which I realize is not the best review for this thing but it may be something similar to what you’re describing.
You can find them on Amazon
edit: seems to be the real thing on this link