How to change slider height to match height of image

See slider at the bottom of this page: Webflow - Nanda Saboia 2023
The slider itself has a bigger height than the images, seen by the grey background. How can I have the slider height only take up the height of the mages?

Specify a value for the height of the slider element and the mask. Although the height is set to ‘auto’ by default, it isnt actually ‘auto’

When I changed to auto on the preview site, it reduces the amount of grey but there was still a small amount visible.