Multi-Column Slider - Blank Space After Last Slide [Help]

Hi all, I’ve created a multi-column testimonial slider and I keep getting a blank space following the last slide rather than it re-showing the first. I’d like this to work on an infinite loop. Any ideas for removing this blank area at the end? I’ve tried a few tutorials to no avail. (Read-Only Link Below) Thanks, Will

Here is my site Read-Only: Webflow - Copy of Copy of Agency In a Nutshell

remove the width of mask 537px

I’ve removed the mask but same issue when scrolling through