Unity Issue Tracker - Shader's color does not change when a boolean type keyword is enabled and the Material is manually instantiated

Active

Under Consideration for 6000.5.X

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Found in

Issue ID

Regression

Shader's color does not change when a boolean type keyword is enabled and the Material is manually instantiated

-

Feb 02, 2026

How to reproduce:
1. Open the attached “KeywordBug” project
2. Open “SampleScene“ scene
3. Enter Play mode
4. Observe Game view

Actual result: The color of the Sphere remains blue
Expected result: The color of the Sphere changes to red

Reproducible with: 2023.1.0a1, 6000.0.65f1, 6000.3.4f1, 6000.4.0b4, 6000.5.0a4

Reproducible on: Windows 11, Windows 10 (by user)
Not reproducible on: No other environments tested

Workaround: Add “mat.shader = mat.shader” before calling “mat.SetKeyword(kw, true)”

Note: Another workaround is Instantiating the material in Awake() and calling “mat.SetKeyword(kw, true)” in Start()