Why Are Blog Images Being Resized

Probably something quite simple, haven't got the time to work it out.

My blog images (the main image inserted via the Add-Ons tab) is being resized, they didn't used to.

Old Blog Post - correct image size - https://www.digitalsave.co.uk/samsung-galaxy-x-launch-2018.html

New Blog Post - incorrect image size - https://www.digitalsave.co.uk/red-dead-2-pc-release-date.html


And just to add, Facebook can't pull any images in anymore when posting for some reason. Again this used to work perfectly, drop into the Facebook debugger and it would grab and image. Doesn't do it anymore.