Steps to reproduce:
1. Download and extract the attached folder
2. Download and install Anaconda (https://repo.anaconda.com/archive/Anaconda3-2020.11-Windows-x86_64.exe)
3. Open the Anaconda Navigator, go to the Environments tab and Create a new environment called "unity_mlagents"
4. Open Anaconda Powershell Prompt
5. Enter "conda activate anaconda3\\envs\\unity_mlagents" and press Enter
6. Enter "cd \[LOCATION_WHERE_YOU_EXTRACTED_THE_PROJECT]\\ml-agents-release_15" and press Enter
7. Enter "pip install -e ml-agents" and press Enter
8. Enter "pip install -e ml-agents-envs" and press Enter
9. Enter "pip install torch" and press Enter
10. Open the "ml-agents-release_15" > "Project" project in Unity
11. Enter "mlagents-learn config\\sac\\3DBall.yaml --run-id=first_run_3dball --time-scale=1" and press Enter (in Anaconda Powershell Prompt)
12. Open the "3DBall" Scene from "Assets" > "ML-Agents" > "Examples" > "3DBall" > "Scenes"
13. Enter the PlayMode
14. Select "TIME_SCALE_CHECK" GameObject from the Hierarchy window
15. Check the "Track Time" checkbox of the Time Scale Test Component in the Inspector window

Expected results: Scaled Time and Unscaled Time fields of Time Scale Test Component values increases at the same steady rate
Actual result: Scaled Time field's value increases at a higher rate than Unscaled Time field's value

Reproducible with: 2018.4.34f1 (1.0.6), 2019.4.25f1 (1.9.0), 2020.3.6f1 (1.9.0), 2021.2.0a15 (1.9.0, 1.9.1)

Note: can also be reproduced using other python environments