Summary

When a webhook with Variable Substitution is configured, the variable substitution doesn't work when worklog events are fired. It works fine when issue related or comments related events are fired

Steps to Reproduce

1. Create an webhook as follows
   • Webhooks URL: append any variable substitution to a valid URL
     • In my case, I used Requestb.in with the project.id variable

       http://requestb.in/r6eynvr6?${project.id}

   • Issue related events
     • Issue: created, updated
     • Comment: created, updated
     • Worlog: created,updated
       
2. Log work on an issue which will trigger the webhooks.

Expected Results

1. The webhooks will include the variable when posting it

Actual Results

1. The webhooks doesn't include any variable for this event
   

Notes

1. It works fine when updating the issue or commenting on an issue
   
2. Doesn't affect JIRA 6.4.14

Workaround

Instead of using Worklog events, use the Issue: Worklog changed event