Using the JQL sprint in openSprints() doesn't include team-managed (formerly next-gen) subtasks

Issue Summary

When using subtasks in a team-managed (formerly next-gen) project, those won't appear in the project issue when using the 'sprint in openSprints()' JQL operation.

Steps to Reproduce

1. Create a team-managed (formerly next-gen) project
2. Create a few issues with subtasks in the project
3. Go to the issue list view (PIN) and use the 'sprint in openSprints()' JQL operation

Expected Results

Subtasks should show in the list of issues.

Actual Results

Subtasks are not appearing in the list.

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available