Azure Functions (Flex Consumption) – Storage Queue trigger not firing when message added

I’m working on an Azure Functions project using the new Flex Consumption model with @azure/functions in TypeScript.

I have two functions:

Producer – sends a message to a storage queue:

export async function sendToProcessingQueue(payload: any) {
    const connectionString = process.env.AzureWebJobsStorage;
    const queueName = "question-paper-processing-queue";

    const queueClient = new QueueClient(connectionString!, queueName);
    await queueClient.createIfNotExists();

    const message = JSON.stringify(payload);
    await queueClient.sendMessage(Buffer.from(message).toString("base64"));
}

Consumer – supposed to be triggered by new queue messages:

app.storageQueue("storageQueueTrigger", {
  queueName: "question-paper-processing-queue",
  connection: "AzureWebJobsStorage",
  handler: storageQueueTrigger,
});

export async function storageQueueTrigger(
  queueEntry: any,
  context: InvocationContext
): Promise<void> {
  context.log("Raw queue entry:", queueEntry);
  // process the message...
}

When I run the app, I only see connected!. The message gets added to the queue (I checked in Azure Storage Explorer), but the function never fires.

Things I’ve verified:

• The queue exists (question-paper-processing-queue).
• Both producer and consumer use the same connection string (AzureWebJobsStorage).
• Message is visible in the queue.
• Function app starts with no errors.

Why isn’t my storage queue trigger firing in Azure Functions?