Twitter card images have started displaying too large on desktop

[AbergavennyNow]

Hi everyone, when I post links from my website on twitter, the cards zoom into the images I have set for the blog/post instead of displaying correctly.

On the left is how the image displays on my Twitter feed, compared to how it should (and used to) look on the right.

Thanks,
Arthur

[andypiper]

Known issue, duplicate of Summary Large Image Sizes Problem.

[andypiper]