Job in queue is disappeared

Question

I have a NestJS server. I am using Bull library in my project. The problem I'm struggling with is jobs disappearing. To fix this, I logged all queue event listeners.

like so

@OnQueueCompleted()
  async onCompleted(job: Job) {
    console.log(`Job completed: ${job.id}`);
  }
  @OnQueueFailed()
  async onFailed(job, error) {
    console.log(`Job failed: ${job.id} with error: ${error}`);
  }
  @OnQueueActive()
  async onActive(job) {
    console.log(`Job active: ${job.id}`);
  }
  @OnQueueError()
  async onError(job) {
    console.log(`Job onError: ${job}`);
  }
  @OnQueueDrained()
  async onDrained() {
    console.log(`Job onDrained`);
  }
  @OnQueuePaused()
  async onPaused(job) {
    console.log(`Job onPaused: ${job}`);
  }
  @OnQueueProgress()
  async onProgress(job) {
    console.log(`Job onProgress: ${job}`);
  }
  @OnQueueStalled()
  async onStalled(job) {
    console.log(`Job onStalled: ${job}`);
  }
  @OnQueueWaiting()
  async onWaiting(job) {
    console.log(`Job onWaiting: ${job}`);
  }
  @OnQueueRemoved()
  async onRemoved(job) {
    console.log(`Job onRemoved: ${job}`);
  }

After register tasks in queue, I got the logs like next,

8|dev  | Job onWaiting: 1340
8|dev  | Job onWaiting: 1341
8|dev  | Job onWaiting: 1342
8|dev  | Job onWaiting: 1343
8|dev  | Job onWaiting: 1344
8|dev  | Job onWaiting: 1345
8|dev  | Job active: 1340
8|dev  | Job active: 1342
8|dev  | Job completed: 1342
8|dev  | Job completed: 1340
8|dev  | Job onDrained
8|dev  | Job onDrained

I totally have no idea. How can I find cause of this problem?

• Additional information
• I am running two server which have different port (3001, 3002) in a EC2. These two server is sharing one redis server which is in localhost:6379. When I request to add queue to 3001 port, queue is added in 3001 port but tasks are processed in 3002 port.

What is the problem with me?