Issue Summary

When a user creates a sub-task, it is expected to inherit the parent issues components however since JIRA 7.1.X this stopped being so.

Steps to replicate

1. Craete a test project.
2. Create components for this project.
3. Add the component field to the view/edit screen.
4. Create an issue in the test project.
5. Assign components to this issue.
6. Create a sub task for the issue using More > Create Sub-Task

Expected Result

JIRA would create the sub-task and it would inherit the components of it's parent issue.

Actual Result

JIRA creates the sub-task but clears out the component field.

Issue has been verified to have started in JIRA 7.1.X