I think the sword at heard the shamisen realized who is her real owner(since oden left the sword to hiyori)and the sword started to disobey Zoro
Possibly. It's clear as of 1032 that Zoro has yet to fully master Enma, so the sword rampaging due to certain causes is not out of possibility.
Another Youtube comment said that Zoro's will weakening since he does not know yet the secret to King's durability hax could be another reason why Enma is running amok.
thats very interesting.
but the sword also has a role to accept the wielder too, right? because when Zoro got Sandai Kitetsu its more like Sandai accepting Zoro (mostly because Zoro's will) by not cutting his hand when Zoro barely understands the will of the sword itself
This is just my guess, but I don't think the sword has the role to accept its wielder. I feel like it's more that the wielder has to be worthy of the sword's judgment to wield it completely.
Sandai Kitetsu was, yes, mastered before Zoro fully understood the will of the sword. But, to be fair, Zoro put up SK for a bet and SK lost that bet since fate had it that Zoro would leave that shop with his arms intact. This may sound nonsensical, but considering we could safely assume that SK had never been owned by anybody of note before (unlike Enma and Shusui), I think Zoro winning that bet made SK "accepted" Zoro as its owner, so to speak.
Shusui, too, acknowledged Zoro, despite having been owned by Ryuma for years, because Zoro won their duel (this was immediately confirmed by Ryuma himself).
I think, the problem with Enma is that it was "simply given" to Zoro. Yeah, yeah, Hiyori gave it as a replacement for Shusui, but handling a curse sword is never that easy. Unlike SK, Zoro never bet a thing against Enma. And, unlike Shusui, Oden was long dead before Zoro even had the chance to best him in a duel. Add to the fact that Zoro is consistently struggling to draw out Enma's power makes me think Enma has yet to acknowledge Zoro as worthy of Enma's service. Yet.