Dot pattern with CanvasGroup

Godot Version

4.4.1 linux

Question

Hi, I believe I should see pure white but I’m getting a dot pattern.
Sprite2D is a white rectangle.
Empty_sprite is a Sprite2D with no texture, but its material set to CanvasItemMaterial with Blend=multiply.
Taking the sprites out of CanvasGroup, I do see pure white.
The pattern doesn’t scale or offset when moving CanvasGroup, Sprite2D or Node2D.
Any idea on the reason behind this ?