When I embed multiple Google Docs under separated {expand} macros, only the first embedded document that you click to expand will display. Clicking to expand the other embedded documents will display a blank box, but will still span the width/height specified in the iframe parameters.

Is there any way to fix this?
I'd like to embed multiple Google Documents onto one page, and use the expand function to minimize clutter and help with scroll-ability. Users will only click to expand the document relevant to them, instead of having all embedded documents display at once when accessing the page.
Depending on how I embed the document (HTML vs {drive} macro vs widget connector), I also get an error

that repeatedly pops up when I expand the embedded doc and does not go away until I refresh the page.