To reproduce:

1. Download attached project “cpu-profiler-scaling.zip" and open in Unity
2. Open "SampleScene" scene
3. Open Profiler
4. Deselected all logical groups except Scripts
5. Enter PlayMode
6. After a few seconds, Pause / Stop PlayMode
7. Enable the Rendering group

Expected results: The CPU Profiler should scale the Graph based on the currently enabled Groups
Actual results: The CPU Profiler does not scale the Graph

Notes:
- This issue appears both on Windows and macOS
- Workaround: Save the Profiling Data and Load it

Reproduced on Unity 2017.4.0f1, 2017.4.20f2, 2018.3.7f1, 2019.1.0b5 and 2019.2.0a6
Cannot reproduce on Unity 2019.2.0a7 and 2019.2.0a8 because FPS is locked on 60 FPS