I don't know what happened. But if I open some GitHub page, almost every element on the page does not render properly, such as the theme, font, layout and so on as in the picture: https://ibb.co/dmG8Gcy

It happens often, but sometimes it doesn't matter how lucky I am. I have refreshed the page and the page shows the same thing. Can anyone help, is this an app bug or an error I made?