This is a display issue. When you use this link https://www.goodreads.com/book/show/2... (where everything after the title is removed from the URL) no isbn is showing.
It looks like an unusual variation on the situation that sometimes on a book with only an ISBN10 the ISBN13 of the default edition is shown. But in this case both the ISBN10 and 13 of the default edition are shown, which I haven't seen before. It stops happening when you save the edit page even without making an actual edit.
https://www.goodreads.com/book/show/2...