I’ve been going around trying to find a solution to this but haven’t found any. Just realised that some of my links/blog posts don’t show images on the card, like this one:
However, it would show up for this one:
The log shows this for all them, with or without image showing:
INFO: Page fetched successfully
INFO: 30 metatags were found
INFO: twitter:card = summary_large_image tag found
INFO: Card loaded successfully
And I even edited the robots.txt to specify Twitterbot to let it crawl through the whole site. Still nothing. Any ideas as to why?