Here is my sample Trial.rar (309.1 KB)
At first, before the html is fully loaded, the duplicate has not been generated and the dynamic content is still fine.
After it is fully loaded, the duplicate is generated
and
As @hua mentioned before, the cause maybe lie in line 525 to 544 of the file async.js.download.
Unfortunately, the dynamic content does not work if I remove these lines. I would like to ask how to disable generating such duplicates. Thank you so much for your help!