Hi @iankusht ,
Thank you for replying. I updated some pictures.
https://ibb.co/HNgDb6B I created a custom block and inserted the shortcode into the web page
https://ibb.co/PjvxjB7 When I open the page, it doesn’t align with the title below
https://ibb.co/D9VYNKx After a very short time, it will show normal
https://ibb.co/1v1h6cD I checked the source code and found that the css file for this custom block is very far down, on line 8604.