centerPadding is ignored with responsive breakpoints

any centerPadding values within the responsive breakpoints are ignored on the latest slick 1.8.1:

responsive: [{ breakpoint: 1024, settings: { centerPadding: '30%' } }, { breakpoint: 600, settings: { centerPadding: '15%' } }, { breakpoint: 480, settings: { centerPadding: '10%' } } ]

any ideas/solutions or similar experiences?