Please understand that sometimes giving only the answer is not good enough and we want a “show your work” answer, in this case a corrected answer of how the event is supposed to work. Like with my speculation here:
And note the official phrasing for this event was almost identical to the Werebat event during the Moon Flask Campaign, but did that draw the same complaints? e.g:
And there’s still the report of users getting different battles from each other in situations where they expect the RNG to be seeded the same (as is typical of events). Which is distinct from simply not describing the event correctly in the official post.