Slider only shows up half when the overflow is hidden in the published site


I modified a multi-step form template that I bought. When I publish it, the form only shows up half (I use Chrome Browser). I tried to make the slider’s mask overflow visible, then the next slide will be blinking. If I turn off the overflow, it should show up half. Can someone take a few minutes to look at the problem and see if you can help to solve it? I really appreciated your help!!

I tried to recreate the form and slide. The same problem here.

Here is my site Read-Only: [LINK][1]
(how to share your site Read-Only link)

[1]: Preview Link