i am currently not able to add an amp-ad tag inside of a amp-fx-flying-carpet tag. The flying-carpet container will be rendered correctly but the containing amp-ad tag is apparently not processed at all.
Strangely, the amp-ad tag is properly rendered when I place the exact same amp-fx-flying-carpet tag a second (or third) time on the page.
Does someone have the same problem?
Here is an example fiddle
(You have to scroll down the output frame)
Here is the issue on github https://github.com/ampproject/amphtml/issues/6735
It seems that the developer has fixed something and i hope it will be released soon.