Create node window doesn't close unless a node is created and remains open even if the VFX editor is closed

Steps to repro:
1. Create a new HDRP template project.
2. Project Window > Right Click > Create > Visual Effect
3. Double click on it to open the VFX editor
4. VFX editor > Right Click > Click node
5. Close the VFX editor

Expected result: The Create node window closes

Observed Result: The create node window doesn't close

Reproducible On:
2020.2.0a5 with Package Version 8.0.1, 7.1.8, 7.1.7
2020.1.0b4 with Package Version 8.0.1, 7.1.8, 7.1.7

Not Reproducible On:
2020.1.0a1 with Package Version 7.1.0
2019.3.08f1 with Package Version 7.3.1

Environment: Occurs only on Mac