Godot 3's Sprite2D normal map is very dark, possibly inverted

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:bust_in_silhouette: Asked By jarlowrey

I made a sprite and added a texture and normal map. Then I added a Light2D. The result is below. How can I make it not look so dark? It looks like the normal is inverted.

enter image description here

Edit: seems to be a bug 2D Sprite Normal Maps Are Inverted · Issue #18299 · godotengine/godot · GitHub