Board Thread:Theories and Speculation/@comment-25139119-20150820032806/@comment-26822192-20150915063654

I don't see how it's a plot hole,Kurama and other tailed beasts were created long after Hago and Hamura defeated ten-tails(Kaguya). Of course they don't know anything about Kaguya and Hagoromo simply didn't tell them about her.