ASP .NET Core Blazor bind-Value not updating field

I'm new to Blazor and I'm trying to build a very simple form with it. The method "OnInitialized" works fine, meaning after rendering the page the value "Hello World!" is shown in the text box.

However if I change the value and submit the form the value does update the field "userInput". Does anybody know the reason for it and how to fix?

Cheers!

@page "/simpleform"<PageTitle>TestPage</PageTitle><h3>Einfaches Formular</h3><EditForm Model="userInput" OnValidSubmit="HandleSubmit" FormName="test"><DataAnnotationsValidator /><ValidationSummary /><div class="form-group"><label for="inputText">Text eingeben</label><InputText id="inputText" class="form-control" @bind-Value="userInput.InputText" /></div><button type="submit" class="btn btn-primary">Absenden</button></EditForm>@if (submittedText != null){<p>Du hast eingegeben: @submittedText</p>}@code {    private UserInputModel userInput = new UserInputModel();    private string? submittedText;    protected override void OnInitialized()    {        userInput.InputText = "Hello World!";    }    private void HandleSubmit()    {        submittedText = userInput.InputText;    }    public class UserInputModel    {        public string? InputText { get; set; }    }}

using Test.Components;var builder = WebApplication.CreateBuilder(args);// Add services to the container.builder.Services.AddRazorComponents()    .AddInteractiveServerComponents();var app = builder.Build();// Configure the HTTP request pipeline.if (!app.Environment.IsDevelopment()){    app.UseExceptionHandler("/Error", createScopeForErrors: true);    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.    app.UseHsts();}app.UseHttpsRedirection();app.UseStaticFiles();app.UseAntiforgery();app.MapRazorComponents<App>()    .AddInteractiveServerRenderMode();app.Run();