I have tested this on several different machines, and the conflict persists:
iF “Fading in/out for page transitions” option in Superfly is turned on, “The Grid” grids are not visible on Cornerstone pages in Chrome browser. They are visible in Firefox.
I don’t need that option anyway, but just thought to report it.
I replicate that setup in my test site and the Grid’s grid displays fine in Cornerstone. Please check your version compatibility https://community.theme.co/kb/version-compatibility/ and also try testing for a plugin conflict.