Why can't some browsers on the phone slide when adding elements to the h5 game?

Project address: http://brkqkj.cn/text/index.html

Today, advertisements are added to the back of the canvas, but after adding elements, the page cannot be scrolled. what is the reason?

the page cannot slide until you see the original
clipboard.png
touch-action attribute.

After

can be deleted, you can slide when Wechat opens it, and it can slide in some higher versions of browsers

.

what is the reason why browsers can"t slide in old browsers?

seek a solution.

Mar.11,2021
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MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1ea3607-47a08.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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