Width Issue on Phone Landscape Width

I’m using plugin version 2.2.3. When viewing the site between about 500px and 775px width the slidshow is narrower than the browser width and aligns to the right. The slideshow is set to full-width and it works properly at all other widths I’ve tested. Any idea what the problem could be?

https://www.ads-software.com/plugins/fluid-responsive-slideshow/