Issue Summary

In normally circumstances the option to create sub-tasks under work types Epic and above hierarchies will not be available.

But if your project has its work type scheme configured in a certain way the option will appear (though unresponsive).

Steps to Reproduce

• Have a project with a work type scheme configured in with work types of the following hiearchies:
  • 2 (above Epic. e.g. Initiative)
  • 0: regular work types (e.g. Task)
  • -1 (Sub-task types)
• Notice that you will now see the option Subtask when clicking on the button + Add in the work item view

Expected Results

The button should not be available.

Actual Results

Not only the button is available, it is unresponsive, adding to the confusion for users.

Here's a recording: Sub-task button.mp4

Workaround

Configure your work type scheme in a different way so you can avoid having that button displayed under undesired work types.