Can anyone tell me why my XSLT in a Query XML action isn't escaping as it should?

This is the output in an email notification:

Praesent imperdiet dapibus nisi non venenatis. Ut quis tincidunt neque, eget luctus risus. Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec tempor nunc vitae risus viverra congue. Sed eget lacus non arcu dapibus sagittis sit amet vitae est. Phasellus auctor nisl id aliquam pharetra's.

XSLT in the action:

<?xml version="1.0" encoding="UTF-8"?>
...
<xsl:value-of select="DescriptionNPHL" disable-output-escaping="yes" />

DescriptionNPHL is a plain mutilple lines of text field.