Different photo width on Post template style 6

Hi there,

We often use Post Template style 6 for our posts and the image goes full width across the screen, like this one: https://www.goworldtravel.com/extremadura-spain/

However, we published a new post today with the same Post Template style 6 as usual, and the image is large, but does not go full width across the screen on desktop. We can’t figure out why or how to fix this: https://www.goworldtravel.com/summer-in-the-adirondacks/ The image is 1200 in width, so definitely wide enough.

Any ideas on how to fix this?