Using FastEndpoints Postprocessor and the SendResultAsync with .ToMinimalApiResult extension doesn't provide the filled "Result" in the context

[Kermel]

I'm experimenting with FastEndpoints and I have an endpoint that finishes with the following call in the HandleAsync method:
Endpoint class:
internal class LoginEndpoint : Endpoint<LoginRequest, Result<LoginResponse>>

Handler method:

public override async Task HandleAsync(LoginRequest req, CancellationToken ct)
{
    var loginResponse = ...;
    ...//login response is of the Result<LoginResponse> type
    await SendResultAsync(loginResponse.ToMinimalApiResult());
}

Configure method:

public override void Configure()
{
    Verbs(Http.POST);
    Routes("/login");
    AllowAnonymous();
    PostProcessor<LoginPostProcessor>();
}

And the LoginPostProcessor:

internal class LoginPostProcessor : IPostProcessor<LoginRequest, Result<LoginResponse>>
{
    public async Task PostProcessAsync(IPostProcessorContext<LoginRequest, Result<LoginResponse>> context, CancellationToken ct)
    {
        if(context.Response?.Status == ResultStatus.Ok) // Login successful
        {
            //...do something
        }
    }
}

But the context.Response is null.

When I finish my Handler method just by this call:
await SendAsync(loginResponse, cancellation: ct);

then everything works....

Am I doing something wrong?