There is no version 9.8.x of Tableau. The highest dot version of Tableau is 9.3.8.
If this issue is persisting, please create a support ticket with Tableau support to help assist with this issue. This would require someone reviewing workbooks and tableau server specific details to assist and determine if this is a bug from that version. You might also consider updating the recent 10.0 or 10.1 release and verifying the issue exists in this version.