How to reproduce:
1. Open the "SampleScene" in the attached project "case_1169786"
2. Go to Edit -> Project Settings -> Graphics
3. Click on the "Clear" button at the bottom of the window
4. Disable the "Cube" GameObject
5. Repeat steps 2 and 3 one more time

Expected results: Tracked Shader quantity is lower when "Cube" is disabled
Actual results: Tracked Shader quantity is the same in both cases

Reproducible with: 2019.1.11f1, 2019.2.0b10, 2019.3.0a10
Not reproducible with: 2017.4.30f1, 2018.4.4f1, 2019.1.0b5, 2019.2.0a6

Additional notes:
1. The first affected versions of each stream are the ones where Async Shader compilation was introduced. Disabling Async Shader compilation will solve this issue.
2. The reason why there are more tracked shaders when Async Shader compilation is on is that Cube GameObject shaders remain tracked even though this GameObject is disabled.