SSRS 2016 - adding parameter in dataset fails

I have a report which uses a inline dataset with a query including several parameters (prompts), but when I try to add another parameter in the query it does not work. If a try to add the parameter manually by rightclicking parameters and add parameter and it does appear but it does not work with the dataset - WHY, bug??

After adding the parameter in the query you need to create the new parameter in the report builder and then map it to the new parameter in the query.