Jk mentioned that he hurt himself while performing, I guess this was the first night of the L.A. shows. And we already know t*e was injured recently and couldn't perform for their online concert. They are overworked and if they aren't eating right that would lead to more injuries. I'm surprised one of them hasn't fallen out on stage in front of armies. There's recorded times where they came close. Especially jk who has had to be carried back stage.
They are only in their 20s, who knows what permanent injuries and poor health they will have when they're older. It is sad.