Disable push up and down iframe on hype

I embbed a simple website on an iframe1 in Hype.
On that website has an iframe2 with scrolling function.
When I scrolling iframe2 , iframe1 is pushed up and down,
How can I prevent push up and down iframe1 when I scrolling content in frame2?
test.zip (291.1 KB)

Thank you

A post was merged into an existing topic: Scrolling=“0” not working on iframe