Thank you for reaching out to us. This is the default behavior of the image responsiveness. Your image has more width than height so the image maintains it's aspect ratio in all screen sizes thus gets smaller when the screen is resized.
You probably need a different approach here to make both columns of same height, please follow any of the method here:
Now instead of using an image element in the right column, set it as a background image of the column, now both will have the same height but this method has a catch, by default the background-size property is set to cover so your image will cut off when the screen is resized but that's a better approach
- I checked your other pages and couldn't replicate the issue on my end, this could only be the cache issue, try clearing all caches including your browser's cache and see if this resolves the issue
Hope this helps!