Transparent geometry does not render in Built-in Renderer Deferred mode when a custom post-processing effect is enabled on Mac with Metal API

Steps to reproduce:
1. Open the attached "IN-145930" project
2. Open the scene called ReproScene
3. Observe the Game View

Actual Result: Transparent Cube and Sprite Objects don't render when the custom shader Globals post process effect is enabled
Expected Result: Transparent geometry should render correctly with the effect enabled as it does on other rendering APIs and platforms

Reproducible with: 6000.0.0f1, 6000.0.78f1, 6000.3.19f1, 6000.5.2f1, 6000.6.0b2, 6000.7.0a1

Reproducible on: MacOS 26.5 (M1)
Not reproducible on: Windows 11, Ubuntu 24.04

Note: This issue is present in both builds and the editor