Board Thread:Episode Discussions/@comment-25319479-20160630125952/@comment-5407586-20160705194404

Hagoromo states that the Ten-Tails was sealed inside him after he and Hamura defeated it.

Black Zetsu states that the Six Paths — Chibaku Tensei was used to turn the Ten-Tails into the gravity core of the Moon, and that Hagoromo didn't know about the Ten-Tails being a manifestation of Kaguya's will. Why didn't Hagoromo tell Naruto and Sasuke the truth, if he actually knew it?

Yin-Kurama states that Ten-Tails' jinchūriki don't die after the extraction as long as the Demonic Statue is still inside their body, taking the Sage as an example.

See the problem? Hagoromo became the Ten-Tails' jinchūriki even though the beast was sealed in the Moon? Only solution for me is Hagoromo breaking the seal (like Madara did) in order to use the Ten-Tails' power and, on his deathbed, send the body back to the Moon after splitting its chakra into the nine tailed beasts.