Based on support conversations and feedback here, we just made a little change to how new cells work on Observable.
Before, when you create a new cell, as soon as you unfocused it, or moved on to a different cell, the code would disappear. You could click the button to keep code open, but this was optional and was often missed by people just starting out with Observable.
We think the better default is for code to stay open by default, so new code cells now stay open. You can, like before, click the to allow them to close, in case you want to clean up your notebook for publishing.
This change won’t change the pinned’ness of existing cells on existing notebooks - it’s just a change to the editing and creation flow that hopefully makes things clearer!