Splide Slider not loading correctly?

Hello,

Can you guys help me figuring out this behaviour please (I’m trying to figure it for a long time - I’ve recorded a small video):

→ when I create a splide nestable slider with a custom post type loop, everytime the slider loads, the contents are not formatted correctly (like every slide on top of another) and then (maybe) the JS loads and it’s all ok.

Is there a fix for it? It’s kind of annoying to see the info jumping around everytime the page loads.

Thank you for your help!

Can anyone share some insights please?

Thank you!