I fixed it by removing only the image and not its container, but I'd still like to know how it's supposed to work if someone has the time.
Hi, This is certainly a user issue rather than a technical one. Using the component/gallery-10, in Webflow. It works fine (image 1) until I remove another item, and then it falls into 2 columns (image 2), eventhough it's still set as 3 columns.