problem
The official document mentions
NexT turns on animation effects by default, and the effects are written in JavaScript, so you need to wait for the JavaScript script to be fully loaded before displaying the content.
If you care more about speed, you can set this field to false to turn off the animation.
But I did not find it when I searched canvas_nest.
the reason
Canvas_nest is changed to motion , and the settings are more detailed. There is a general switch called enable, and you can turn off the loading animation by changing true to false