I think her face got a lot thinner too.
I was browsing DC and saw a cap from the Yultidambi perf. I think she's now just as thin as she was then but we're just not used to it, since we've been seeing a thicker Yuri for almost 2 years now. What I'm afraid the most is that now that she's lost the fat in her face, she might get an injection to make it fuller.
She kept talking about exercising in UFO messages, I think she's not done yet. This might just be the first step, burning out the fat. I'm gonna wait and see if her shape will change again later this month.