This is a fresh WordPress install with only Pro 6 Beta installed and nothing else - it is not an upgrade.
PAGES
Pro 5.1.5 - create a page in the dashboard and save it, even as a draft.
Open “Page Builder” and the page is available to edit in the builder.
Pro 6 Beta - create a page in the dashboard and publish it (same if a draft)
Open Cornerstone - page is not available under All Documents.
The page only becomes available in Cornerstone if we go to dashboard -> pages and click edit with cornerstone and save the page in Cornerstone.
POSTS
Very similar issue with posts. If I create a new post and publish it. When in the builder it is not available and I can’t select the post in the preview. I have two posts and I’m editing a layout assigned to all posts. I cannot select any of my posts to preview.
The preview display did not show any changes until I did a refresh (I think this is mentioned as a known issue.)