Copy-PowerBITile Does not work with Service Principal

Using the following command files while authenticating via Service Principal but it works when authenticated with an user. (given proper access)
Copy-PowerBITile -WorkspaceId $SrcWorkspace.Id.Guid -DashboardId $SrcDashBoard.Id.Guid -TileId $tile.Id -TargetDashboardId $TgtDashboard.Id.Guid -TargetWorkspaceId $TgtWorkspace.Id.Guid -TargetReportId $TgtReport.Id.Guid -TargetDatasetId $TgtDataset.Id.Guid

DEBUG: 10:46:29 AM - Cmdlet version: 1.0.840.0
Copy-PowerBITile : Operation returned an invalid status code 'Unauthorized'
At line:1 char:1
+ Copy-PowerBITile -WorkspaceId $SrcWorkspace.Id.Guid -DashboardId $Src ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : WriteError: (Microsoft.Power...CopyPowerBITile:CopyPowerBITile) [Copy-PowerBITile], HttpOperationException
    + FullyQualifiedErrorId : Operation returned an invalid status code 'Unauthorized',Microsoft.PowerBI.Commands.Reports.CopyPowerBITile

VERBOSE: Status Code: Unauthorized (401)
DEBUG: 10:46:31 AM - Copy-PowerBITile end processing.

Start by reproducing Copy-PowerBITile with the command and service-principal authentication shown in the issue, then compare it with the working user-authenticated case. Trace the cmdlet's Power BI request and authentication path to identify why it returns 401. Done means the same tile-copy operation succeeds with a service principal that has the stated access, with coverage for the failing authentication path.