IHostedService .NET 6 not starting when deployed

I have an API which contains a HostedService that is built in VS2022 with .Net 6.

When I run locally the service is called as expected and everything works fine but when deplyed, the service doesn't seem to start.

I have tried many different configurations and even tried using a background service but it all has the same result. Here is my code:

I have an existing app build in VS2019 .Net Core 3.1 that has a HostedService and is working fine. I noticed that when I converted my .Net Core app to .Net 6, the service did not start when I deployed so I decided to just build a little app to try and find what's causing the issue.

Program.cs

using HostedServices.Services;

var builder = WebApplication.CreateBuilder(args);

builder.Host.UseSerilog((context, loggerConfiguration) => loggerConfiguration
        .ReadFrom.Configuration(context.Configuration)
        .Enrich.FromLogContext()
        .Enrich.WithMachineName());

// Add services to the container.

builder.Services.AddControllers();

builder.Services.AddHostedService<MainService>();
var app = builder.Build();

// Configure the HTTP request pipeline.

app.UseHttpsRedirection();

app.UseAuthorization();

app.MapControllers();

app.Run();

Here is the Hosted Service

namespace HostedServices.Services
{
    public class MainService : IHostedService, IDisposable
    {
        private int executionCount = 0;
        private readonly ILogger<MainService> _logger;
        private Timer _timer;
        private Task _executingTask;
        private readonly CancellationTokenSource _stoppingCts = new CancellationTokenSource();

        public MainService(ILogger<MainService> logger)
        {
            _logger = logger;
        }
        public Task StartAsync(CancellationToken cancellationToken)
        {
   
            _logger.LogInformation($"Test Hosted Service Started {DateTime.Now}.");
            _timer = new Timer(DoWork, null, TimeSpan.Zero,
                    TimeSpan.FromMinutes(1));

            return Task.CompletedTask;

        }

        private void DoWork(object state)
        {
            _executingTask = DoWorkAsync(_stoppingCts.Token);
        }

        private async Task DoWorkAsync(CancellationToken token)
        {
            _logger.LogInformation(
                    "Doing work: {0}", DateTime.Now);

        }

        public Task StopAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("Service is stopping.");

            _timer?.Change(Timeout.Infinite, 0);

            return Task.CompletedTask;
        }

        public void Dispose()
        {
            _timer?.Dispose();
        }


    }
}

Everything runs fine locally but when I deploy it, the service doesn't seem to start, no log files are generated and I can't seem to find any errors reported.

Any ideas?

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