Sticky Column not working

Hello, i've got an issue on this URL https://scopri.linkeasy.it/lp-coupon-50/... as you can see the column is being sticky on top but when I scroll it keeps being sticky going over the rest of the page. I would like to make that column sticky until when I scroll it reaches its end. Here's a recording of the screen.
https://www.loom.com/share/7a32bfb0f7c946ae8f976eb3fd47640c?sid=88c589c2-4ae6-464d-917d-90805373388f


What is the issue?



(you can see the section I'm talking about quite at the end, you will see two similar sections for the form, i'm testing)

Thank you guys!

Simone

 

Hello! Thank you for your fast response. I did what you suggested but the issue has changed. See recording below.
https://www.loom.com/share/9ae397d031cc44a0a9ee823493c855a9?sid=78df0110-5fe6-419e-ba8d-466a280483bb

The column is remaining sticky for just few scrolls but then it stops. I wish the column to be sticky on top until I reach the end of the form on the left.

Any suggestions?
URL still the same: https://scopri.linkeasy.it/lp-coupon-50/

This is the screenshoot of the column setting. Sorry it's in italian.. but "Riga" means row.


Thank you very very much

Simone