Azure – "AADSTS65001: The user or administrator has not consented to use the application" but the Admin has consented

I am adapting the project sample provided by Microsoft for Multi-tenant Azure AD apps.

I am extending SurveyAuthenticationEvents.TokenValidated() so that in the sign up logic, I hit up Microsoft Graph to get the tenant display name so we can store something a little more meaningful than just a GUID to identify the new tenant.

Something like this:

Organization? org = default;
var tokenAcquisition = context.HttpContext.RequestServices.GetRequiredService<ITokenAcquisition>();
var auth = await tokenAcquisition.GetAuthenticationResultForUserAsync(new string[] { "User.Read" }, tenantId: azureTenantId, user: context.Principal); // "User.Read", "Organization.Read.All"
var graphClient = new GraphServiceClient(
    new DelegateAuthenticationProvider(
        (requestMessage) =>
        {
            requestMessage.Headers.Authorization = new AuthenticationHeaderValue("bearer", auth.AccessToken); // context.SecurityToken.RawData);
            return Task.CompletedTask;
        }));
var results = await graphClient.Organization.Request().Select(x =>x.DisplayName).GetAsync();
org = results.FirstOrDefault();

The third line is failing with the exception:

Microsoft.Identity.Client.MsalUiRequiredException: AADSTS65001: The user or administrator has not consented to use the application with ID ‘xxxxxx’ named ‘xxxxx’. Send an interactive authorization request for this user and resource.

Please note that this is IMMEDIATELY after the tenant administrator has just consented.

However, the error seems to be intermittent. In fact if I debug and break on the problematic line, wait a couple of seconds and then let it run it works fine. It is as if Azure AD needs a second or two after the consent to properly update the service principals and consent status for the new tenant, before it will issue an access token for a downstream API.

Am I missing something here or do I just add some retries and work around the issue?