Why IPolicyEvaluator removes data from AuthenticateResult.Properties (except expires)?

[ramonesz297]

I am trying to understand, what I did wrong, I am using AuthenticationProperties and to get them - I need to call context.AuthenticateAsync, even if the current request is authenticated.
During debugging, I found that default IPolicyEvaulator creates a new ticket, but without properties.

using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Http.Features;
using System.Security.Claims;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddAuthentication("a1")
    .AddCookie("a1");

builder.Services.AddAuthorization(o =>
{
    o.AddPolicy("p1", (p) => p.AddAuthenticationSchemes("a1").RequireAuthenticatedUser());
});

var app = builder.Build();

app.UseHttpsRedirection();

app.UseAuthentication();
app.UseAuthorization();

app.MapGet("signIn", (HttpContext context) =>
{
    var ci = new ClaimsIdentity("a1");
    ci.AddClaim(new Claim(ClaimTypes.NameIdentifier, "1"));
    var claims = new ClaimsPrincipal(ci);
    return context.SignInAsync("a1", claims, new AuthenticationProperties()
    {
        Items =
        {
            { "data", "42" }
        }
    });
}).AllowAnonymous();

app.MapGet("api/withoutPolicy", (HttpContext context) =>
{
    var feature = context.Features.GetRequiredFeature<IAuthenticateResultFeature>();
    return context.Response.WriteAsJsonAsync(feature.AuthenticateResult?.Properties);
}).RequireAuthorization();
//result:
//{
//   "items": {
//       "data": "42",
//       ".issued": "Fri, 29 Sep 2023 16:19:53 GMT",
//       ".expires": "Fri, 13 Oct 2023 16:19:53 GMT"
//    }
//}

app.MapGet("api/withPolicy", (HttpContext context) =>
{
    var feature = context.Features.GetRequiredFeature<IAuthenticateResultFeature>();
    return context.Response.WriteAsJsonAsync(feature.AuthenticateResult?.Properties);
}).RequireAuthorization("p1");
//result:
//{
//    "items": {
//        ".expires": "Fri, 13 Oct 2023 16:19:53 GMT"
//    }
//}

app.Run();

Is there anything I miss, or it is by design?

Thanks in advance!

[Kahbazi]

@ramonesz297 This seems to be a design choice. Related issues #47059, #6518.