When I run a URL through the validator, the image that I want to be displayed seems to be detected, but it is not the image displayed.
Eg, when the validator detects the following meta for one of my web pages:
The card preview instead displays my fallback image. A tweet for the same web page also displays the fallback image. Why is the image used in twitter:image not being picked up?
Could it be because the site’s robots.txt is blocking twitter?