Indexterms in FAQ Questions result in duplicate text?

["Robert A. Ballance" <raballa@sandia.gov>]

If I put an <indexentry> into an FAQ <question>,  the index term gets 
duplicated in the list of questions in the HTML output.

Configuration:  Saxon, Docbook 4.2 XML, and the Docbook-XSL stylesheets 
1.65.1

Example:

<question>
<para>
Can I use
<indexterm><primary>OOPS</primary></indexterm> docbook as my
documentation standard?
   </para>
</question>

gives the following output in the list of questions

Q:
Q: Can I use OOPS docbook as my documentation standard?
Q:

but
Q: Can I use docbook as my documentation standard?
A: ...

in the full sequence.

... Bob Ballance