The latest release of Page builder includes the following resolved issues:
When creating items from Manage Items, Page builder now keeps you on the newly created version instead of reverting to version 1.
You can now add components to page branches in Page builder when editing a branch, even if the Home item is open.
Fixed an issue where reloading page design or partial design views redirected authors to the Home page. Page builder now preserves the correct design context after reload, reducing the risk of editing the wrong item.
Page branches can now be fully opened and edited in Page builder as expected.