Sending attached to this message a ZIP file with a very simple scene.
The issue is reproduced in it.
Just click on "start interactive session". It takes a long time before you can stop it or do anything else.
I'm using:
Corona version: 6 (Hotfix 1)
Full-speed, Non-debug, MaxSDK 2020
Build timestamp: Sep 25 2020 15:41:07
Forest Pro 6.2.2
3ds Max 2020.3
Windows 10
Thanks Maru.