Rls not working on embedded

Anonymous Desktop update? I thought that too, so I rolled back and installed an unrefreshed pbix file from July. Still the same problem. 

So the issue is some background updates that MS have done to Power BI Embedded in the Service, not in the Desktop. It clearly impacts certain forms of RLS and not others.

My service to hundreds of users is now down, first time in 3.5 years it's been unavailable. ☹️ I hope they fix it real soon. Comms is not their strong point, but they do fix disasters pretty quickly and this is a massive disaster. They have almost breached GDPR law for me by exposing some customers' data to other customers. Fortunately we picked it up before our customers found out.