I tested the issue described in the first ticket and can confirm that I could see the problem on your site, and that I was able to reproduce it on my site (screenshot).
The problem requires multiple field groups on the same page. When editing nested repeatable field groups, they will appear behind another field group lower down the page.
I've escalated this thread so that it can be confirmed and fixed by the developers, and I'll keep you posted.
Got this from the safari console, Might be it. When in "Edit with Layouts" mode the light orange area is huge and you really have to scroll down the page to edit the fields. images attached.