Problem with Portion properties in Textframe shape

I’m trying to change the text and style of a Portion that is contained inside a Textframe shape. The variable values are being changed appropriately. However, the changes are not reflected on the powerpoint file that is written.

Changing the text of a Portion in a Textholder seems to work fine. However, the Underline property isn’t being reflected on the written file as well.

Your help would be greatly appreciated.
Thank you.

Dear Jeselon,

Thank you for the report.
Yes, this problem really exists and I will investigate it.

Dear Jeselon,

Problem with changing style of text was fixed.
Please download and install last hot fix.