Why does my image slider work on page but not when that page is on front promo?

Can you please help me I'm using meta slider and when I use the short code on a page, no problem but when I make that page visible as the "promo headlilne" section, full text The slider doesn't always work. Like sometimes it will show the slide show container and the navigation arrows but then other times it just stacks the phones on top of each other. Thanks