Steps to reproduce:
1. Create an empty unity project.
2. Create Material in Assets folder - This will spawn the worker process once you have enabled the OnDemand feature
3. Add an "adb2.txt" file in the unity project root
4. Put the line "OnDemand=Lazy" in it
5. Stop the editor, delete the Library folder and start the editor again.

Expected: Only the master process writes to the "Library/EditorInstance.json" file
Actual: There are a couple of Unity workers (Unity.exe) writing to the "Library/EditorInstance.json" file

Reproduced in: 2019.3.0a1, 2020.1.0a1, 2020.1.0a8
Not reproduced in: 2017.4.33f1, 2018.4.11f1