Schema validator misses telephone in an anchor tag

The validator does not find the telephone number between `<a></a>`
```
<section itemscope itemtype="https://schema.org/Person">
<a itemprop="telephone" href="tel:+1-800-555-0100">(800) 555‑0100</a>
<p itemprop="telephone">(800) 555‑0101</p>
</section>
```