>>6958195How exactly is it 5 minutes at most, did you see for how long the cardboard was on stage? They were practicing with the expectation of at least having her singing along to those songs. Either way, the explanation seems fairly simple: Matsuri didn't agree on a specific date with her before her break, and after her break she wasn't doing anything company-related, which was reconfirmed by her manager on July 2nd.
Could she do it on hiatus? Probably, but she didn't, neither for Matsuri nor for Rushia. The whole reason behind the meltdown is a misunderstanding on Matsuri's part, considering she's been ok with Haachama not being a part of it for 16 days before blowing up on twitter. The only reason she was pissed is because she still recorded for Rushia, but it wasn't on the same timeframe.
Rushia got Haachama to record before her break, most likely by luck, not necessarily preparation for that, considering Haachama didn't warn anyone of her break, but she did.
If they had set dates before her break and Haachama just didn't show up, then sure, that's much worse. But I'm sure Matsuri would make sure to mention that, she wasn't exactly being subtle in her rant.