Create Issue from Slack incorrectly shows Parent field in Team Managed projects

Issue Summary

Using the "Create issue from" dialogue in Slack, the "Parent" field is shown for the "Task" issue type. Selecting the dropdown shows no results, even if there are epics in the project. This affects Team Managed (formerly known as next-gen) projects, not Company Managed projects.

Steps to Reproduce

1. Connect a Jira instance to Slack
2. Create a Team Managed project
3. Create an Epic in the project 
4. In Slack, use the "Create Issue from" action to create an issue from a message
5. Select the Team Managed project, and "Task" as the issue type

Expected Results

The task is able to be linked to a parent epic from the Create screen in Slack

Actual Results

The "Parent" field shows "No result" when selected

Workaround

Create the issue without selecting a Parent Epic / Epic Link in Slack. Once the issue is created and the Jira Cloud app gives you the issue key, open the issue in the Jira interface. Use the "Add parent" action in Jira to add the Task to an Epic.