PDF Output - Draft comments visible in link text

Tested with latest DITA OT 3.3 trunk code.
For example, I have a topic with a section, title and draft-comment:

<draft-comment author="tst">123456789</draft-comment>This is a section title (3)

T

Then in another topic, I add an xref to the above section:

.

The PDF output shows the draft comment text inside the link text. The HTML-based output does not have this problem.

Reproduce the issue with the supplied DITA topics and compare the PDF output with the HTML-based output. Trace the PDF xref and link-text processing, then verify that draft-comment text is excluded from the PDF link text while the HTML output remains unaffected.

Written by the indexing model from the issue text.