Android Tablet: Report runs in Power BI app but not when embedded in a Power App

Issue:
I have a tablet where a Power App runs a simple questback Power App. Works fine, saves responses to a SQL server which in turn works as source for a Power BI report. Report also works fine, published in the companys report apps for PC's, phones etc.

So now I want the users to be able to see the report on the tablet as well. So first I install the Power BI app on the tablet, and the report runs fine once I've added the tablet-account ("tablets@......") to the access-group for my reports.

But if I add a PowerBI-tile to my power app, and links the actual report to this, I just that I (the tablet account) don't have access to the report. Same userID involved as in the powerBI-app.  If I request access, I get an email to my admin-account and grants access, but still the PowerBI-tile says "no access". I have restartet the tablet several times, but still "no access".

Are there any more layers of access when the report is embedded in a Power App ??

Regards,

John Martin