Webhooks aren't being fired when workflow transitions are associated with custom events in JIRA

Summary

Webhooks aren't being triggered when custom events are associated with workflow steps.

Steps to Reproduce

1. Create a custom event as detailed on this documentation page: Adding a custom event
2. Choose a transition to create a workflow post function as follows:

Fire a <your custom Event here> event that can be processed by the listeners. 

3. Set a webhook condition to fire when an issue is transitioned to the workflow transition associated with the custom event
4. Transition the issue
5. Webhook will not be triggered and no payload will be received

Expected Results

The webhook feature should work with custom events added to post functions.

Actual Results

Workflow steps associated with custom events are not triggering the webhook feature.

Workaround

Workaround is to set an additional post function (Trigger a Webhook post function) to trigger the webhook explicitly:

• Video showing how to set the additional post function in details: https://www.screencast.com/t/mcnhLvrA