Inconsistent Linear Scroll Transition

I used a width and background transition effect in the “Our Team” slider in the page below which works great when scrolling to the left but behaves differently when scrolling to the right – the item to the right scrolls first before applying the transition effects and before it loads the other slide elements.

http://new.aegiscms.com/

https://ww.wp.xz.cn/plugins/carousel-horizontal-posts-content-slider/