What I did: I created a new note, gave it a title and then typed a paragraph in the first section of the note. Then I hit enter and typed a to-do item and changed its type to Checklist.
What happened: The checklist circle was added. Then I selected a different project. When I came back to the project where I just added the note that contained the to-do item the checklist circle was gone.
What I expected: I expected the checklist circle to remain with the entry.
Things that might be helpful to know (Agenda version, OS and model, etc): Mac OS 10.13.2, Agenda 1.1