List odd/even css selector problem

[BostonMerlin]

I'm using the following css assigned to a list to create the background-color odd/even effect shown below. In 2.1, notice the rows where 'odd' is not working. Prior to 2.1 it worked.

I have a feeling the new 'infinite scroll' functionality is resetting the internal index when the items are outside the bounds of the list container.

Thanks, John

.widgetListItem:nth-child(odd)
{
    background-color:white;
}

list-odd-even-css-prob.PNG