We have a website about interactive images: http://www.thinglink.com
Most of the pages on the website use Player card (with an app component too). E.g. this Fight Club best moments page - http://www.thinglink.com/scene/419198660794908673
Now we are adding an app card for the home page, about page, etc and… validator finds the app card just fine for http://www.thinglink.com , but tells “Failed to find any meta tag from the page” for e.g. http://www.thinglink.com/about while meta-tags are identical (and actually generated by the same template).
What’s happening there? 
Has anybody had similar issues?