Sidebar will render with space between it 2 deep

### Describe the bug

<img width="627" height="455" alt="Image" src="https://github.com/user-attachments/assets/012966db-988a-438c-961e-6130a5340b7a" />

Discovered by @hoffmanjs 

### Steps to Reproduce

Use the "popout" feature of the sidebar and nest `children` two levels deep