To reproduce:
1. Import Courtyard project from the asset store
2. Make sure you've deleted GI Cache
3. Open Courtyard scene and re-bake lighting
4. Build and run standalone player

Expected result: Lighting should look pretty much the same as in the Editor

Reproduced with Unity: 2019.1.0a12
Not reproducible with: Unity 2018.3.0f1, 2019.1.0a5, 2019.1.0a9

Tested on: Macbook Pro 2017 + touch bar
OS: 10.14.2 Mojave
CPU: 3,1 GHz Intel Core i7
GPU: Radeon Pro 560 4096 MB
Reproduced only with Metal API, OpenGLCore works as expected.

Not reproducible on iOS platform.