Nested and mixed lists are an interesting beast. It’s a corner case to make sure that
Lists within lists do not break the ordered list numbering order
Your list styles go deep enough.
Ordered – Unordered – Ordered
ordered item
ordered item
unordered
unordered
ordered item
ordered item
ordered item
ordered item
Ordered – Unordered – Unordered
ordered item
ordered item
unordered
unordered . . .