with other Newsmag themes The Accelerated Mobile Pages plugin uses images of 300 px no full image and therefore works fine.
While using your plugin uses full images, I’ve also put the links to see this problem.
Certainly, it’s just a simple function to take 300 px images and not as full from the Accelerated Mobile Pages plugin.
This plugin is much more used than the AMP plugin you tested, as it has a lot of features.
I look forward to your feedback.