[nameless] appears to be a dropdown menu.
That could be cusing rhe issue.
The “frame obscured” thing is very sensitive.
Could be any sort of div anywhere on the page that appears momentairly and disappears again. That will then trigger the protection
and if your CSS is slow loading and loads after the iframe, well then the z-index is added late after the protection has fired. Theres a great number of things it could be. Even more so when trying to make a iframe be as large as the page.
Bit I think the issue here is the drop down navigation