C# Repeat Slow Task

Program.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;

namespace JoyRepeateTask;

public class Program
{
    private static async IAsyncEnumerable<IReadOnlyList<object>> CountUp() {
        yield return new object[] { 1 };
        await Task.Delay(100);
        yield return new object[] { 2 };
        await Task.Delay(100);
        yield return new object[] { 3 };
        await Task.Delay(2000);
        yield return new object[] { 4 };
        await Task.Delay(100);
        yield return new object[] { 5 };
    }

    private static async IAsyncEnumerable<IReadOnlyList<object>> WithOneSecondRepeats(IAsyncEnumerable<IReadOnlyList<object>> reader) {
        var enumerator = reader.GetAsyncEnumerator();

        bool hasNext = true;
        IReadOnlyList<object> item = null;
        Task<bool> moveNextTask = enumerator.MoveNextAsync().AsTask();

        while (hasNext) {
            await Task.WhenAny(Task.Delay(1000), moveNextTask);

            if (item is not null) {
                yield return item;
            }

            if (moveNextTask.IsCompleted) {
                hasNext = moveNextTask.Result;
                item = enumerator.Current;
                moveNextTask = enumerator.MoveNextAsync().AsTask();
            }
        }
    }

    public static async Task Main()
    {
        var reader = CountUp();
        reader = WithOneSecondRepeats(reader);

        await foreach (var item in reader) {
            Console.WriteLine(item[0]);
        }
    }
}