I am having the same issue with vertical images in my galleries as well. My galleries are a mix of horizontal and vertical images, and in the past I’ve had to reorient and resave the images in Windows or Photoshop before they would display correctly. Any help would be appreciated. Thanks.
The images are stretched to fill the entire dedicated space in the grid. This is the default behavior for many galleries, but it can be adjusted by styling the galleries to display images differently. With the proper styling, images can be displayed in their original aspect ratio without being stretched or distorted.