With three's css3drender, it cannot be displayed on iPhone x (IOS 12.0), but it can be displayed on iPhone x (IOS 14.5). Can anyone encounter this problem and provide some good solutions

With three’s css3drender, it cannot be displayed on iPhone x (IOS 12.0), but it can be displayed on iPhone x (IOS 14.5). Can anyone encounter this problem and provide some good solutions