This issue was resolved for me in 3.0.22.40446 on Windows 10 Pro 1903. I believe I rebooted before testing. Insync is now auto syncing all files I create both in the cloud and uploaded to the cloud from other devices.
It’s possible the issue has only been resolved in Windows. Assuming the Ubuntu gui is the same, you can check to see if the setting is enabled. I posted a screenshot of it here if that helps: Items created in cloud don't auto sync locally - #11 by kyle