Until an hour ago (1:00PM IST) I was able to add/remove custom sections to custom pages that I created. Then I got access to the new theme editor features.. now I don’t see any sections in the page editor. The blocks are not rendering but the settings in schema are rendering. Using Impulse theme by Archetype.
You can make your browser viewport smaller then 1600px. Or zoom browser out until you will see the blocks again, I guess. Very confusing!