RLS roles in embedded report stopped working

I have experienced this issue as well.  Our users with multiple roles were able to access the data on Thursday, Dec. 16, and on Friday, Dec. 17, many tables were blanked out with the error message and the circled-x in the middle of the data table.  This occurred only with those that had been assigned multiple roles.  Those users with one role had no issues.  We've had no change in the relationships between tables for months and no problem with our multiple role users, until now.   There is no time stamp on the automatic updates, but I'm betting that the Dec, 2021 roll out occured on Dec. 16.  At least all our reviews point to a Microsoft problem and these posts validate that as well.  Please let us know when a solution is available.  We have implemented work arounds, however, the product (Power BI) is malfunctioning and these work arounds are unsustainable for such a vaunted platform as Power BI.
Thank you.