Blazor server DelegatingHandler cannot access services in DI

I have a project in BlazorServer and I'm creating document metadata (via a REST API) and uploading them (through another REST API).

My action after button click is very simple:

DocumentDto toCreate = new() { ... };byte[]? fileData = GetFileData();await _documentService.Create(toCreate, fileData);

My _documentService.Create looks like this:

public async Task Create(DocumentDto input, byte[]? fileData){    try    {        var document = await _client.Create(input);        if (document is not null && fileData is not null)            await _attachmentClient.Create(document.Id, fileData);    }    catch (Exception ex)    {        _logger.LogError(ex, "Error during creating document. {serialized}", JsonSerializer.Serialize(input));    }}

And finally, here is my _client.Create method:

public async Task<DocumentDto?> Create(DocumentDto input){    var result = await _httpClient.PostAsJsonAsync(Endpoint, input);    return await result.Content.ReadFromJsonAsync<DocumentDto>();}

And my _attachmentClient.Create method:

public Task Create(Guid documentId, byte[] fileData){    var content = new MultipartFormDataContent();    var fileContent = new ByteArrayContent(fileData);    fileContent.Headers.ContentDisposition = new ContentDispositionHeaderValue("form-data")    {        Name = "file",        FileName = "Document.pdf"    };    content.Add(fileContent, "file", "Document.pdf");    return _httpClient.PostAsync($"{Endpoint}/{documentId}/pdf", content);}

Both my clients are registered the same way:

services.AddHttpClient<DocumentClient>()    .AddHttpMessageHandler<AuthenticationStateHandler>();services.AddHttpClient<DocumentAttachmentClient>()    .AddHttpMessageHandler<AuthenticationStateHandler>();

My AuthenticationStateHandler looks simple and works just fine for almost all situations:

public class AuthenticationStateHandler : DelegatingHandler{    private readonly IHttpContextAccessor _accessor;    public AuthenticationStateHandler(IHttpContextAccessor accessor)    {        _accessor = accessor;    }    protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)    {        var service = _accessor.HttpContext?.RequestServices.GetService<TokenProvider>();        // service exists (is not null) for _client but not exists (is null) for _attachmentClient        if (service is not null)        {            var token = await service.GetAccessTokenAsync();            request.Headers.Authorization = new AuthenticationHeaderValue("Bearer", token);        }        return await base.SendAsync(request, cancellationToken);    }}

I have made a comment at line in AuthenticationStateHandler what is causing an error for me.

Does anyone have an idea why DelegatingHandler sometimes has access to the correct scope and sometimes not?