Godot version

v4.0.dev.calinou [c17a541]

System information

Windows 10, Vulkan Clustered, GTX 1060 6GB (471.41)

Issue description

Applying a CanvasItemMaterial or ShaderMaterial to a CanvasGroup node cause it to render as a white rectangle

Steps to reproduce

1. Create CanvasGroup node
2. Add Sprite as a child
3. Apply material to CanvasGroup node

Minimal reproduction project

CanvasGroupBug.zip