BlockCart Scroll from Mobile

[Luigi Donato]

Hi..
I've a problem with the scrolling of block cart on much mobile..
When I add 5-6 products on my cart, the don't show to me the scrollbar..
I've added a short script to add a scrollit class where the products is > 2 and this CSS code:

.scrollit {
    padding-right: 20px;
    max-height: 60vh;
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 480px){
	.scrollit {
   		padding-right: 20px;
    	max-height: 40vh;
    	overflow-y: scroll;
    	-webkit-overflow-scrolling: touch;
	}
}

This have solved the problem for much mobiles, but not for all.. For example isn't compatible with Firefox and with much Samsung mobile..!
Someone can help me? 

-- EDIT --
If I add:
 

overflow: auto;

This works for some phones, but it does not work for others on which it first worked..!

Edited October 25, 2017 by LuigiD (see edit history)