OData Data Refresh - including custom Power Query formulas inclusing OData.Feed

I have problem similiar to Julian. I also do user PowerBI OData queries. A have a portfolio report for projects where I access PWA (project online) and Sharepoint-projectrooms (lists within each projectrom) to accumulate and generate a portefolio report. Works 100% on PowerBI Desktop, but refresh fails on powerbi.com. I need the OData query to be dynamic and build the OData query string based on parameters before accessing the datasource.