Which would make a part of it non-canon. Which was my point.
I am pretty sure it was an error. The movie is not like a manga where every panel is drawn by Kishi. It was made by movie producers under Kishi. A few errors are bound to be present. Unlike the manga where Kishi has a week's time to publish his manga under VIZ which is enough time to fix most errors, the movie once released, the mistakes present cannot be fixed. That scene was most likely an oversight or an Easter Egg.
It's funny how you call a whole movie filler based on only one scene and even contradict the creator's words. :lol
Then we have this Hamura's Chakra problem. Did it disappear? She used it to the fullest and it never blossomed again? Because so far, it seems like it.
Rikudou Chakra (I am using it for both Hagoromo and Hamura cause they got the power from Kaguya + I have no idea what Hamura's chakra would be called) does not dissapear; it starts to degrade over time.
Naruto and Sasuke's Rikudou chakra also degrades over time. That's why they have an In-active and Active Rikudou Stages.
In Naruto's Case :-
Inactive : RSM With only Kyuubi's Chakra - Naruto loses his tomoes.
Active : RSM with chakra of all bijuus - Naruto regains his tomoes.
In Sasuke's Case :-
Inactive : The Rinnegan loses it's tomoes.
Active : The Rinnegan regains it's tomoes.
Same will also apply to Hinata. After Toneri's fall; there would be no reason whatsoever for Hinata to keep on using her Hamura chakra for battle. She fell in love with Naruto and made a family with him. We can assume her Hamura Rikudou Chakra went Inactive/Went To sleep (Think of how Yin Kuruma went off to sleep before re-awakening again).
Dont forget Kurama comin out of Naruto.Also Naruto getting caught in genjutsu despite being perfect jin
The movie is canon but in essence everyone knows its a filler movie at its core as none of the events in the movie or the villains are ever backed up in the source material
Naruto and Kuruma are in complete co-operation. There are no seals in Naruto (Naruto personally removed the seal on Kuruma) which restrict Kuruma, i.e; Kuruma at his wish can easily come out of Naruto.
Hachibi and Bee can also do the same cause no seals are involved. Just before being sealed by the Gedo Mazou by Madara, Hachibi ejects Bee from his body to ensure that he survives. If Hachibi can leave the body of his Jinchuriki/Eject him, why can't Kuruma do the same ?
Perfect Jins are not immune to Genjutsu. They will fall under genjutsu if their Bijuu also falls under it. Since both Bijuu and Jinchuriki have fallen in Genjutsu, they can't disrupt each other's chakra flow and break out of the Genjutsu. I will have to check the summary though if Kyuubi indeed was awake after Naruto was knocked out by Genjutsu.
Bold : Is purely laughable. The Last actually told us what happened to Hamura and how his legacy was carried over by Hinata. Hamura was the biggest blank spot in the manga when it finished. The movie filled that blank spot.