The documentation states that multiple fields in text queries are not supported. That should be amended to say something along this lines of:
- normally multiple fields in a text query won't have the effect that you might expect because each triple is indexed as a separate document
- multiple fields in a text query are accepted and may be useful, e.g. where the text index has not been created by the provided Jena text mechanisms but provided by other means
- an explanation of limitations on the bound values should there be multiple fields in a returned document
As requested, I will suggest text for the documentation change shortly, but I'm happy if you would rather write it yourself.