I’ve seen this happening on and off for about a month, but for some reason our images are not showing up in the Summary on our Twitter Cards:
In the validator - it shows the image after a brief second of loading time, but it never shows on the web.
On the flip side, we use a generic image (I assume Twitter has cached this), it works fine:
Any idea what’s going on here? Meta tags are the same on both pages, and the validator shows the image in both situations.