[Bug]: OnQueueEvent for 'waiting' not triggered when job delay set to zero

[ArnoPauw]

Version

v5.40.1

Platform

NodeJS

What happened?

When adding a job to a queue with delay set to 0 (zero) the OnQueueEvent 'delayed' triggers instead of 'waiting'.

One would expect a job with delay=0 is regarded as not actually being delayed.

How to reproduce.

Add job to a queue, explicitly setting the opts to { delay: 0 }

    await queue.add(name, data, {
      delay: 0,
    });

Add a OnQueueEvent event for delayed and waiting

  @OnQueueEvent('delayed')
  onDelayed({ jobId }: { jobId: string; returnvalue: string; prev?: string }) {
    this.logger.log('Delayed: ', jobId);
  }

 @OnQueueEvent('waiting')
  onWaiting({ jobId }: { jobId: string; returnvalue: string; prev?: string }) {
    this.logger.log('waiting: ', jobId);
  }

'delayed' event triggers but waiting does not trigger.

Relevant log output

Code of Conduct

• I agree to follow this project's Code of Conduct

[ArnoPauw]

I would like to add that was introduced somewhere between v5.7.8 and v5.26, might help debugging.

[roggervalf]

Hi @ArnoPauw, since v5.19.0 you will face this issue. I'm currently working on fixing it in #3052