Hi,
I recently moved a new version of the site recreated in PRO for https://sport.center and have to confirm some irregularities in its behaviour. Some pages are not saved when edited in Cornerstone. I will try to recreate those from scratch and check if that works for me. And the worst thing that when I create a new page I can not save any changes in it. I get fun message like it was saved but top bar doesn’t go till the very end and Cornerstone doesn’t reload the page as usual.
For the information, I tried a few different tools for migration - WP Migrate DB Pro and Updraft. In both situations I faced the same issues with exotic behaviour of Cornerstone in PRO. However, the process with Updraft went smoother for me.