Text shadow causes stray shadow-colored pixels

[CenTdemeern1]

Tested versions

Not reproducible in Godot 2 & 3 because these features work differently
Reproducible in Godot 4.0 & 4.2.1

Godot 2

In Godot 2, you couldn't combine outlines and shadows effectively as far as I can tell

Godot 3

In Godot 3, shadows were being applied before outlines

Godot 4.0

Godot 4.2.1

(Edit: added cleaner 4.2.1 screenshot)

System information

Godot v4.2.1.stable - macOS 14.3.1 - Vulkan (Forward+) - integrated Apple M2 - Apple M2 (8 Threads)

Issue description

On labels with a text shadow greater than or equal to the outline size (must be >= 1) with the shadow directly below the text, odd gaps/stray pixels are visible.

Here's what it should look like instead (expected behavior)

Steps to reproduce

Load the provided MRP.

Minimal reproduction project (MRP)

TextShadowRepro.zip

[akien-mga]

CC @bruvzg