Why is the text content of links ignored if it is in landmark regions or articles

[JAWS-test]

<a href="#" title=title1 id="test1"><article><h2>heading1</h2>test1</article></a>	
<a href="#" title=title2 id="test2"><section><h2>heading2</h2>test2</section></a>	
<a href="#" id="test3"><aside><h2>heading3</h2>test3</aside></a>	

For <article> and <aside> the text content is not used for the link label. This is so with Chrome, Firefox and AccName Prototype test. I wonder: why? Where is this in the specification? The elements have "Name from author", but they do not need a label. In this case the text content should be used as label of parent elements, right? Also a list has "Name from author", but here the text content is used as label.
Even if the list is explicitly labeled with aria-label, the screen reader outputs its text content as link label, although the browser only send the aria-label to the Accessibility API as link label.

And does it make sense? According to the HTML specification, a link may contain these elements. The problem now is that not only the links have no labels, but the entire text content is not perceptible even when read linearly with a screen reader.