We encounterd several issues since a while when users have created Power BI Desktop reports based on Power BI service data sources.
1. When a user a PBID report has made with a Power BI Service as a source they cannot re-open the PBIX. Power BI gives a proxy error. That is strange because the have made a connection with the power bi service when the made the report. When we first open Power BI Desktop en sign in with the account and then go to Open PBIX from file, the file loads succesfull in Power BI Desktop and everything works.
2. When a user is only member of the workspace where the Power BI service data set lives he cannot see the power bi service data set with Power BI Desktop. When we give the user admin rights (instead of Member) in het Power BI Workspace where the data set lives the user can use the data set in Power BI Desktop. In previous versions of Power BI Desktop this worked as described in "https://docs.microsoft.com/nl-nl/power-bi/desktop-report-lifecycle-datasets" but now we need to give the user admin rights in the workspace before he can use the Power BI service datasets....
could you check these issues with the Power BI service data sets in combination with Power BI Desktop?! In the Power BI service everything works great, it only happens in Power BI Desktop.