.NET 8 Blazor WebAssembly api responses List of objects shows count of 0 but actually has elements

I have a .NET 8 Blazor WebApp project with a separate WebAssembly project for the front end. When I call the api and return a list of objects, it shows a count of 0, yet actually contains elements. It shows both in Rider's debugging value watches and when I am looking at List.Count value in code. In postman the json that the api is returning is formatted correctly, so I think it's something to do with the deserialization on the WebAssembly side. But have no idea what I'm doing wrong.

   public async Task<ApiResponse<List<TreatmentDto>>> GetTreatmentsAsync()   {        var response = await httpClient.GetAsync("api/treatments");        return await response.HandleResponse<List<TreatmentDto>>();   }

    public static async Task<ApiResponse<T>> HandleResponse<T>(this HttpResponseMessage response)    {        if (response.IsSuccessStatusCode)        {            return await response.Content.ReadFromJsonAsync<ApiResponse<T>>() ?? new ApiResponse<T> { Success = false };        }        return new ApiResponse<T> { Success = false, Message = "API call failed", Errors = new List<string> { response.ReasonPhrase } };    }

    public class ApiResponse<T>    {        public bool Success { get; set; }        public T Data { get; set; }        public string Message { get; set; }        public List<string> Errors { get; set; } = new List<string>();    }

Postman response

{"success": true,"data": [        {"id": "2f312b5f-6d6f-4615-8bf1-b7b88bc40365","type": 0,"name": "HYDROCORTISONE 10 MG ORAL TABLET [CORTEF]","description": "asdfasf","isMuted": false,"customerNotes": "","medicationRxcui": 208712,"medicationRxstring": "HYDROCORTISONE 10 MG ORAL TABLET [CORTEF]","tzid": "","expectedUnits": [                {"id": "dab0842c-226d-4c49-8b8c-8f1ba0766086","treatmentId": "2f312b5f-6d6f-4615-8bf1-b7b88bc40365","numberOfUnits": 2,"unitType": "Pills","order": 0                }            ],"reminders": [                {"id": "84699631-db01-4e09-b292-6c26f5c4236d","rRule": "FREQ=WEEKLY","startDate": "2024-09-08T10:00:00-04:00","endDate": null,"untilDate": null,"tzid": "","treatmentId": "2f312b5f-6d6f-4615-8bf1-b7b88bc40365"                },                {"id": "a77dfbe2-5290-4453-99af-9c7ac3dbe5b7","rRule": "FREQ=WEEKLY","startDate": "2024-09-08T09:00:00-04:00","endDate": null,"untilDate": null,"tzid": "","treatmentId": "2f312b5f-6d6f-4615-8bf1-b7b88bc40365"                }            ]        }    ],"message": null,"errors": []}

Relevent Client Program.cs services

builder.Services.AddScoped(sp => new HttpClient    { BaseAddress = new Uri(builder.HostEnvironment.BaseAddress) });builder.Services.AddScoped<ITreatmentService, TreatmentService>();