I have an Azure Storage Queue that gets messages from an IoT device. The messages are not Base64 encoded, compressed or anything else. They are plain old UTF-8. Here’s a sample message:

{"id":"649251ce-5b46-9e3b-ac63-15fe4ffb852c","topic":"/SUBSCRIPTIONS/2BA02699-F96D-4474-BC02-888E2CF968F8/RESOURCEGROUPS/MYRESOURCEGROUP/PROVIDERS/MICROSOFT.DEVICES/IOTHUBS/DVV1234","subject":"devices/DT12345","eventType":"Microsoft.Devices.DeviceTelemetry","eventTime":"2024-12-12T14:20:13.311Z","data":{"properties":{"alarm":"","history":null,"current":null,"devicemsg":null,"mqtt-dup":null},"systemProperties":{"iothub-connection-device-id":"DV12345","iothub-connection-auth-method":"{"scope":"device","type":"sas","issuer":"iothub"}","iothub-connection-auth-generation-id":"637432295369411031","iothub-enqueuedtime":"2024-12-12T14:20:13.311Z","iothub-message-source":"Telemetry"},"body":"IHsiRFQiOnsiVCI6ICIyMDI0LTEyLTEyIDE0OjIwOjE1In0gLCAiVW5pdCI6eyJJRCI6IjEwMTIzNDUiLCJOYW1lIjoiRFQxMjM0NSJ9LCAiQVMiOltdfQ=="},"dataVersion":"","metadataVersion":"1"}

My Azure queue triggered function is not reading these messages. Instead, it is just logging this message to the console for every message that drops in the queue:
[2024-12-12T14:31:09.342Z] Message has reached MaxDequeueCount of 5. Moving message to queue 'mqtt-inbound-poison'.

I have stripped the code down to the most basic queue trigger function app:
Program.cs:

using Microsoft.Azure.Functions.Worker.Builder;
using Microsoft.Extensions.Hosting;

var builder = FunctionsApplication.CreateBuilder(args);

builder.ConfigureFunctionsWebApplication();

// Application Insights isn't enabled by default. See https://aka.ms/AAt8mw4.
// builder.Services
//     .AddApplicationInsightsTelemetryWorkerService()
//     .ConfigureFunctionsApplicationInsights();

builder.Build().Run();

Function1.cs:

using System;
using Azure.Storage.Queues.Models;
using Microsoft.Azure.Functions.Worker;
using Microsoft.Extensions.Logging;

namespace inboundtest
{
    public class Function1
    {
        private readonly ILogger<Function1> _logger;

        public Function1(ILogger<Function1> logger)
        {
            _logger = logger;
        }

        [Function(nameof(Function1))]
        public void Run([QueueTrigger("mqtt-inbound", Connection = "MyStorage")] QueueMessage message)
            try
            {
                _logger.LogInformation($"C# Queue trigger function processed: {message.MessageText}");
            }
            catch
            {
                _logger.LogError("An error occurred processing the message.");
            }
        }
    }
}

But the message about the MaxDequeueCount is all I get. I am 100% certain my queue name, mqtt-inbound, is correct. I am also certain the connection string is correct as I selected the storage account in Visual Studio when creating the project. I just built this minimal test code this morning and I am using the latest and greatest NuGet packages. Since neither my try nor catch message is being logged to the console, I suspect something is occurring before my function has even run, but what? What are my next steps in troubleshooting this?