Thanks for writing to us.
You are using the older version of the X theme and the Cornerstone page builder in both the site. That might be a reason behind your issue. I would suggest you update the X theme and Cornerstone to the latest version i.e 7.2.3 and 4.2.3 and check once.
If you find the issue still exists at your end, please try the migration process once again by following the instruction here: https://theme.co/docs/how-to-migrate-your-site
If none of these above helps, and you are still getting the issue after updating the theme and re-migration, please provide login credentials for your site in a secure note to examine it further, including:
– WordPress Site URL & Login URL
– WordPress Admin username/password
To create a secure note, click the key icon underneath any of your posts.