Microsoft Form in HTML Viewer takes forever to load!

Hi,

I was wondering if anyone has ever tried to embed a Microsoft Form inside an HTML Viewer custom visual.

I know that this is possible by adding some Web content code (iframe with src definition...) in a Tile component on a Dashboard.

I've tried to replicate the same scenario in a report, using an HTML Viewer custom visual this time.  I believe the connection must have broken at some stage while attempting to load the Microsoft Form. As a result I ended up with an endless spinning loading loop... and really didn't have the patience to wait how long it would take to load.   

So if anyone has ever tried it and succeeded I'd be curious to know how they managed to do it or is it just not possible in reports. Thanks