Embed for Customer Portal - Request exceeds the maximum number of datasets - 50

I have developed a website (based on the Embed for Customers example) that based on the user that is logged in it shows them all of their power bi reports selectable by a dropdown list.  I'm using a service principal which has access to the Premium Workspaces.  We are using a Premium Capacity.  If a user has less than 50 reports, the website works fine.  When a user has more than 50 reports I'm getting the following error:

Error

            Status: BadRequest (400)
Response: {"error":{"code":"InvalidRequest","message":"Request exceeds the maximum number of datasets - 50"}}
RequestId: dfd60c00-f508-44e1-a55d-04561c8ae450

This error occurs when the last line of code executes and it tries to generate the token.   Any ideas of what I may be doing incorrect?  My understanding is there is no limitations on generating tokens in a premium capacity.

                // Create a request for getting Embed token 
                // This method works only with new Power BI V2 workspace experience
                var tokenRequest = new GenerateTokenRequestV2(

                    datasets: datasets,

                    reports: reports,

                    targetWorkspaces: targetWorkspaceIds != null ? targetWorkspaces : null
                );

                // Generate Embed token
                var embedToken = pbiClient.EmbedToken.GenerateToken(tokenRequest);