I implemented Twitter Cards for the account @haloathon and they worked fine for a few days. Now they are no longer showing. I have also noticed that other accounts (that do not belong to me) are no longer displaying Twitter Cards and was wondering if this is a Twitter issue?

I’m seeing similar behavior for our account and others. Twitter cards fail to show up in Twitter, but they work fine in the preview tool.

Same here. Everything was fine very recently.

I don’t use Twitter on the web very much (mainly mobile) but is there a new “reply” box when you expand Tweets? I wonder if changes made are breaking cards.

There are a few accounts I have seen that work but most don’t.