How did Tik Tok's facial special effects suddenly change?

Take Huawei p 10 mobile phone as an example:

1. First, open the Tik Tok application on your mobile phone and go to the home page.

2. Then click Open+ in the pop-up window.

3. Then click the "Prop" option in the pop-up window.

4. Then in the pop-up window, find the face props shown below in the props list, and click Use.

5. Your face will be deformed when you take a selfie.