Summary

When add or remove an Epic Link from an issue and check in the history of the issue you can see that this one action (add Epic Link or remove Epic Link) is being shown twice in the issue history (All tab). This causes a webhook for this change to be sent twice. The webhooks are almost identical except for their changelogs ids.

Steps to Reproduce

1. Create an Epic issue
2. Create a non-Epic issue (Story or Task)
3. Go to this non-Epic issue and add the Epic to its Epic Link (Later you can also remove the Epic Link)
4. Check the history of the issue

Expected Results

The addition of the Epic Link (or its removal later) would be displayed once.

Actual Results

The addition of the Epic Link (or its removal) will be displayed twice.

Notes

Additionally you can set a webhook to a request bin and verify that because of this it sends 2 almost identical webhooks, which only difference is the changelog id, each one corresponding to one of the duplicate history itens.

Workaround

None.