Blog Thumbnail & Large Image sizes changed with update

Not sure if this was a theme update or a WP update but the images sizes for blog thumbnails and featured images recently changed. You can see a sample of this here: https://strunkaccess.com/blog/

For single blog posts the featured image has gotten narrower. https://strunkaccess.com/focus-on-reg-e-opt-in-now-more-important-than-ever/

All of the images have been cropped to 1200×675 which worked perfectly before and now the square thumbnail cuts off the sides and the narrow featured image cuts off the top and bottom.

Please advise if this is something that will be corrected or something we need to accommodate for moving forward.