How to prevent navigating onto Items in a ListView that are disabled

Hi,
I am populating a UCommonListView with four Common Button Bases. The first two items are disabled (SetEnabled = false). However, when the list is shown, the first item is focused and I can still navigate to them. How can I prevent that from happening?

I tried overriding OnIsSelectableOrNavigableInternal but that seems to only be called when we reach the end of the list, not when we navigate from item to item.