Inconsistent Summary Card Rendering Behavior


I’ve got a tweet with a summary card attached, and it’s rendering differently for some users on the web. Most notably, it’s missing attribution and the “view on web” link.

Here’s what it looks like to most users:

Note the attribution avatar/name above the image. This is also how it appears in the card validator.

Here’s what it looks like for some “problem” users:

Note the missing attribution and the interesting border around the text.

I’m not sure how to explain this inconsistency. Anyone have any thoughts?

Here’s a link to the URL where the card metadata is posted:

And here are the meta tags:

  <meta name="twitter:card" content="summary_large_image">
  <meta name="twitter:site" content="@betterplaceif">
  <meta name="twitter:title" content="The world would be a better place if">
  <meta name="twitter:description" content="What would you add to or take away from the world to make it a better place?">
  <meta name="twitter:creator" content="@betterplaceif">
  <meta name="twitter:image:src" content="">
  <meta name="twitter:domain" content="">