Cannot Scroll Page on Mobile After Opening Facebook Chat Dialog

Hi everyone!

I got a problem after installing Facebook Chat Plugin on my website.
The website can’t be scrolled once the chat dialog is opened.
And this issue only happens on mobile phone, works well on PC.
I have the same plugin installed on my other website but it works without any issue.

Link to my website :
https://jerrychen.io

Please try the link on a mobile device, click the chat icon on bottom right corner then close the dialog.
I’m using Astra with Elementor Pro.
If anyone knows what might’ve caused the issue…
Thanks in advanced.

Regards,
Jerry Chen

The page I need help with: [log in to see the link]