I have not been following this very closely but it seems like the source of this cyclospora contamination has been very challenging to identify. Especially because it takes weeks before the infected start showing symptoms. Isn't it reasonable to update the official statement as new information emerges? "When the facts change, I change my mind. What do you do, sir?” -John Maynard Keynes.
https://quoteinvestigator.com/2011/07/22/keynes-change-mind/