Thank you
A possible cause is that the modules are momentarily displayed in the viewport prior to the slideshow loading. The animation is then getting triggered prematurely. To amend try adding the following to the Custom CSS field of your templates parameters (Extensions -> Templates -> [YourTemplateStyle] -> Custom CSS)....
@media only screen and (max-width: 1080px) {
#showcase1_modules {
min-height: 500px;
}
}
Ciaran