In Blazor checkbox won't stay checked

I have a simple todolist app in Blazor where when I check a todo item the list of todos are written to a json file. It works up until the last checkbox. The last checkbox won't write to the json file and won't stay checked.

I tried to write to a text file as well as called async methods and StateHasChanged, but nothing seems to work.

@page "/todo"@rendermode InteractiveServer@inject API.IApi todoApi<PageTitle>Todo</PageTitle><h3>Todo (@todos.Count(todo => !todo.IsDone))</h3><input placeholder="Something todo" @bind="newTodo" /><button @onclick="ValidFormSubmitted" class="btn btn-primary">Add Todo</button><ul class="list-unstyled">    @foreach (var todo in todos)    {<li><input @key="todo" type="checkbox" @bind="todo.IsDone" @oninput="CheckboxChanged"/><input class="border-0" type="text" @bind="todo.Title" /></li>    }</ul>@code {    public List<TodoItem> todos = new();    public string? newTodo = "";    public async Task ValidFormSubmitted()    {        Console.WriteLine("Clicked");        if(!string.IsNullOrWhiteSpace(newTodo))        {            todos.Add(new TodoItem { Title = newTodo });            await Task.Run(() => todoApi.Write(todos));            newTodo = string.Empty;        }    }    protected override async Task OnInitializedAsync()    {        todos = await Task.FromResult(todoApi.Read());        Console.WriteLine("Initialized");    }    public async Task CheckboxChanged(EventArgs e)    {        await Task.Run(() => todoApi.Write(todos));        await InvokeAsync(StateHasChanged);    }}

Here is the code for writing to a json file:

using System.Text.Json;namespace Todolist.API{    public class JsonApi: IApi    {        public void Write(List<TodoItem> todos)        {            string json = JsonSerializer.Serialize(todos);            File.WriteAllText("todos.json", json);        }        public List<TodoItem> Read()        {            string filename = "todos.json";            string json = "";            List<TodoItem> todos = new List<TodoItem>();            if (File.Exists(filename) && File.ReadLines(filename).Any())            {                json = File.ReadAllText(filename);                todos = JsonSerializer.Deserialize<List<TodoItem>>(json);                return todos;            }            else            {                File.Create(filename).Close();                return todos;            }        }    }}

Screenshot of last checkbox not checking