Hello,

I have observed that the following errors get flagged when there is an `aside` with a `header` that is a child of a `section` that also has a `header`:

> landmark-no-duplicate-banner *Via: aXe*
>
> - Document has more than one banner landmark
> - Ensure the document has at most one banner landmark
> - Document should not have more than one banner landmark

> landmark-unique *Via: aXe*
> - The landmark must have a unique aria-label, aria-labelledby, or title to make landmarks distinguishable
> - Ensure landmarks are unique
> - Landmarks should have a unique role or role/label/title (i.e. accessible name) combination

[Learn about: ARIA](https://github.com/daisy/ace/issues/new#)

Document has more than one banner landmark
Ensure the document has at most one banner landmark
Document should not have more than one banner landmark

Here is the HTML for the document in question. The errors are flagged for the header of aside.

```html

Chapter 16 xxxxx

Chapter
16
xxxxx

xxxxx

xxxxxxxxxx

xxxxx xxxx xxxxx

xxxx

• xxxxxx

```

Here is a file with `aside` with `header` child that does not trigger these errors:

```html

xxxxx

xxxxx

xxx x x x x x

x xx x x x

xxxxxxx

xxx

vvvv

xx x x

xxx

xxxxx

xxxxx

xxxxx

xxxx

xxxxx

xxxxX

xxxx

xxxxxx

xxxxx

xxxxx

xxxxx

xxxxx

>> xxxxx

1. xxxxx
   

```

Trying to seek some understanding on this rule. I am aware that using hgroup would resolve this but I am not sure if this rule is not incorrect or not.

Thanks,
Franco