I have seen this bug manifest in two different ways:
- Duplicate tickets are created.
- Duplicate transactions are created.
See the transactions on T11143 and T11144 for an example. In order to reproduce this issue, you should be able to follow these steps:
- Create a new Maniphest task and fill out all relevant details (they aren't important here).
- Click on the "Create New Task" button several times in quick succession. More clicks gives you more XP.
The same steps apply to the "Merge Duplicate Tasks" workflow as well.