Emphasis mine, the bug is not in the algorithm but in the way it is described in the paper. I can see how the author's choice of words is a bit confusing here.
Actually, it is not in the paper either. Instead it is in the blog post author's reading of the paper.
> So if you don't quite follow the letter of the text about acceptor selection, and then do follow the text about how acceptors handle accept messages, then you end up with the bug
But per the linked SO thread this is a very easy mistake to make. If the paper is not perfectly clear and does not call attention to this subtetly, I would say that is still an issue with the paper.
Then again I don’t subscribe to the idea that doxumented misbehaviour is fine do ymmv.
Emphasis mine, the bug is not in the algorithm but in the way it is described in the paper. I can see how the author's choice of words is a bit confusing here.