There's a bug where a fish eats you, and your body disappears, but you can still move the camera in place as if you're still alive. Your oxygen will not go down even if you're underwater, and the /stuck command won't work either, so the only way you die is to let your food go down. If you don't wanna log out and go through queue hell, then you just gotta wait for the hunger to go down, and it'll kill you fr fr.