not recognizing role claim

I have a Blazor Server app that uses Windows Auth. Based on the group memberships of the user, I am adding role claims using IClaimsTransformation. The group-to-role mapping is fetched from a DB.

This is my implementation of IClaimsTransformation:

public class WindowsAuthClaimsTransformation : IClaimsTransformation{    private readonly IDataService _dataService;    public WindowsAuthClaimsTransformation(IDataService dataService)    {        _dataService = dataService;    }    public async Task<ClaimsPrincipal> TransformAsync(ClaimsPrincipal principal)    {        if (!(principal.Identity is ClaimsIdentity))            return principal;        var identity = principal.Identity as ClaimsIdentity;        if (identity?.IsAuthenticated == false)            return principal;        var userGroupClaims = identity.FindAll("http://schemas.microsoft.com/ws/2008/06/identity/claims/groupsid").ToList();        var groupRoleMappings = await _dataService.GetList<GroupRoleMapping>();        var roles = new List<string>();        foreach (var mapping in groupRoleMappings)        {            if (userGroupClaims.Any(x => x.Value.TrimEnd() == mapping.GroupSID))            {                roles.Add(mapping.RoleName);            }        }        foreach (var role in roles)        {            identity.AddClaim(new Claim(ClaimTypes.Role, role));        }        return principal;    }}

This is registered as a scoped service in Program.cs:

    public class Program    {        public static void Main(string[] args)        {                var builder = WebApplication.CreateBuilder(args);                builder.Services.AddRazorComponents()                    .AddInteractiveServerComponents();                // add windows auth                builder.Services.AddAuthentication(NegotiateDefaults.AuthenticationScheme)                    .AddNegotiate();                // database interaction logic                builder.Services.AddScoped<IDataService, SqlDataService>();                // add claimstransformation                builder.Services.AddScoped<IClaimsTransformation, WindowsAuthClaimsTransformation>();                builder.Services.AddAuthorization(options =>                {                    // By default, all incoming requests will be authorized according to the default policy.                    options.FallbackPolicy = options.DefaultPolicy;                });                var app = builder.Build();                // Configure the HTTP request pipeline.                if (!app.Environment.IsDevelopment())                {                    app.UseExceptionHandler("/Error");                    app.UseHsts();                }                app.UseHttpsRedirection();                app.UseStaticFiles();                app.UseAntiforgery();                app.MapRazorComponents<App>()                    .AddInteractiveServerRenderMode();                app.Run();        }    }

SamplePage.razor:

<AuthorizeView Roles="Admin" ><Authorized><p>You are an admin. Your roles: @string.Join(", ", @context.User.Claims.Where(c => c.Type == ClaimTypes.Role).Select(c => c.Value))</p><br /></Authorized><NotAuthorized><p>You are not an admin. Your roles: @string.Join(", ", @context.User.Claims.Where(c => c.Type == ClaimTypes.Role).Select(c => c.Value))</p></NotAuthorized></AuthorizeView>

This gives me the following text output:

You are not an admin. Your roles: Admin, User

Which makes me think that my ClaimsTransformation is working properly, however the AuthorizeView is not properly recognizing it.How can I solve this?