iframes and external websites

Hi,
when creating a simple link page with the ‘sidebar’ element some menu items are activated which should load external websites into an iframe beside the sidebar. The website is loaded sucessfully but the content is not responsive. What is missing?
Thanks!
Best regards,
Alex

Webix iframe itself has the same sizing logic as other widgets, so first of all, the issue could be in responsivity settings of the content.
For example, here’s a demo with our site - as far as I can see, it works correctly:

https://snippet.webix.com/4732w0u1