PBI with Power App in Sharepoint

Hi everybody,

I have created a PBI report that contains the PowerApps custom visual. This report works fine, both in Desktop and PowerBI.com. 

We have great experiences with embedding PowerBI webparts in SharePoint pages. 

However, when I try to embed a PowerBI webpart that contains a PowerApp visual, the visual does not work. The visual does not load (visual is grey, with the 4 spinning white dots, no error messages). The rest of the PBI report works fine, it's only the visual that's not loading.

Any idea what could be going on here?

Much appreciated!