To be pedantic, the amusing scenes were not at the WorldCon itself -- they are currently occurring on social media, after the voting numbers were released three months later, which is when everyone found out about the various works which were declared "ineligible" for reasons which are both unknown, and, apparently, unknowable, since Dave McCarty (vice-chair of the Chengdu con and co-head of the relevant committee for handing out the Hugos at this particular WorldCon) keeps repeating that they weren't eligible but refusing to explain on what grounds they were ineligible.
Also, I have zero understanding of statistics, but various people who do have relevant expertise seem to think that the pattern of voting stats looks dodgy in ways suggestive of tampering.
Useful summary from the Guardian: https://www.theguardian.com/books/2024/jan/24/science-fiction-awards-held-in-china-under-fire-for-excluding-authors
