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I noticed too.
The site was in disarray 2 days ago for a while, which could have been the cause.
If you find something strange about one of your models, look at the html address of your model in the address bar. If you see a long character sequence after the name of your asset, it is the sign that something has happened to it.
Long sequence of seemingly random characters at the end of html address is nothing new, cgtrader is always doing that when you name the model with the title that already exist in their database.