PanelRenderer root not inserted in hierarchy if enabled after being disabled in Awake()

Steps to reproduce:

1. Create a script to drive a PanelRenderer
2. In Awake(): panelRenderer.enabled = false
3. In OnEnable(): panelRenderer.RegisterUIReloadCallback(...)
4. Later: panelRenderer.enabled = true

Actual results: The UI isn't visible

Expected results: The UI should appear on screen when enabled

Reproducible with versions: 6000.7 6000.6 6000.5

Not reproducible with versions: 

Can’t test with versions: 

Tested on (OS): 

Notes:

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