Yeah it's definitely frustrating, I can't handle another month of stress haha. I'm also not sure what it means that some people have already heard. I'd imagine the PhD and Masters admissions are separate so maybe they aren't as behind there!
I applied to a PhD at Bren, not Masters, but we were supposed to hear decisions yesterday and instead they emailed at like 4pm their time that they were behind and decisions would be out by the end of March. I wouldn't be surprised if Masters admissions were also affected and later than usual.