Problem with embedding a iframe

hello and before i have to say sorry for my English :wink:

i have a problem with the embed block and a iframe. the iframe works perfect on any browser I tested, including safari on my MacBook Pro. my problem is that the iframe won’t show anything when I visit my site over my iPad Pro. is there a solution? I don’t understand why this problem seems only exist on my iPad. I tested safari, chrome, firefox and opera browsers on my iPad. it doesn’t work with any of them. I hope you can help me. the site url is

I used the following code in the embed block:
<iframe frameborder="0" src="" width="100%" height="100%"></iframe>

Ok here on a ipad pro. By any chance an add-blocker on your ipad?
Only the 2 items with the avatar are not showing.