Is it possible to run Flutter Web on the LINE browser for iOS?

I created the web application by Flutter with LINE LIFF, and it worked well on the LINE browser for Android, but for iOS it's not.

The problem is the scroll bar. When I scroll down on the LINE browser for IOS, the web page must be moved down, but it's not. It activates the Minimizing feature instead, and sometimes this feature removes the web page and goes back to the Rich menu. For Android, it doesn't have this feature, so the scroll bar works normally.