Excel output fails when the data contains "E."

I am using OIBEE 11.1.1.6.0 to generate Excel output. It is failing to create the spreadsheet when the data contains a capital E and a dot, eg "E."

Here is a small sample output generated when I select XML as my output type

<?xml version="1.0" encoding="UTF-8" ?>
<!-- Generated by Oracle BI Publisher 11.1.1.6.0 -->
<DATA_DS>
<G_1>
 <USER_NAME>E.J Smith</USER_NAME>
</G_1>
</DATA_DS>

When I use rtf to generate Excel it produces a error in the output

The report cannot be rendered because of an error, please contact the administrator. java.lang.NullPointerException

I have other reports, including xls, without issue so it appears to be related to how it renders the E. In other datamodels I've found I have to wrap the output in quotes to get it to display but that isn't helping in this case.