Power BI Report Server Report Description Bug

When I try to fill in a Description in the properties of a deployed report on the Power BI Report Server. The report server loses it's connection to the data source(Tabular - Live). The 'Data Source' link in the menu even gets grayed out. 

Are you not supposed to use this Desription field or is this a bug?

We are using this version: Version 1.2.6648.38132 (March 2018)