Batched Notification emails have an empty content when triggered by a custom event using the Issue deleted template

Summary

Batched Notification emails have an empty content when triggered by a custom event using the Issue deleted template.

Steps to Reproduce

• Go to ⚙ > System > Batching email notifications and enable batched notifications
• Go to ⚙ > System > Events
  • Create a custom event using the Issue Deleted event as a template
• Edit any workflow as follows:
  • Click on the transition triggered when an issue is updated
  • Click on the Post functions link from this transition
  • Change the event fired in the post functions to the custom event
  • Publish the new workflow
• Open a new ticket using this workflow
• Wait for the batched notifications to be received
• Check the content of the batched notification email

Expected Results

The batched notification contains:

• an sentence saying "This issue has been DELETED"
• The "deleted" section is present
  

Actual Results

The batched notification is almost empty. It contains the issue key and summary and a link to it, but it's missing the rest of the information:

Workaround

• disable the batched notifications feature