Sortable Items Selector (Parent > Child) not working

[SouthernLlama]

'Sortable' component doesn't allow sorting of items when the 'items' option is specified with a parent-child selector (or ancestor-descendant selector).

For example, none of these will work:

"ul > li"
".a > .b"
".a .b"

I find this odd given that this selector does works:

> li

[Scott González]

This works fine for me. You're probably trying to use the sortable element or an ancestor in your selector. The selector must match elements from within the element. This of it is $( sortableElement ).find( items ).