I am curious about whether adding a list inside an H1 heading could cause any issues:
<h1>
<ul>
<li><a href="...">some link</a></li>
<li><a href="...">another link</a></li>
<li>current page</li>
</ul>
</h1>
The list serves as a "breadcrumb" type navigation.
Alternatively, would it be better to place the list inside the H1?
<ul>
<li><a href="...">some link</a></li>
<li><a href="...">another link</a></li>
<li><h1>current page</h1></li>
</ul>