I've raised a support ticket but wondering if community has seen this issue? A number of pages (up to three now and counting) are failing to display embedded Gliffy diagrams: they're being replaced with a big red box with text "Oops, diagram unavailable".
Support ticket said there were no files in "attachment history" which I should expect to see... Obviously when inserting a Gliffy diagram all of this linking happens automatically: did even realise they appear in attachment history. Also aware sometimes a diagram can be inserted new, or as a reference to an original diagram on a different page: not sure how they appear in that case? Either way: have noticed the issue happening on pages with NEW diagrams in them.