How can I stop Siri from opening on single click on my iPad?

normally if hold the top button it will open Siri, but my ipad somehow and sometimes only one click it will open, but one click is for open ipad screen. i call china support, give me feedback is just restart ipad, i works if i restart my ipad, but it will appear after few days. don't know the reason. for now i have to close the action for on hold the button.

BTW, china support very bad. i don't want ask them anymore.

[Re-Titled by Moderator]

Original Title: a Bug about siri