I seem to see a problem with action items not being check-offable when they are within an Excerpt tag.
To reproduce, I can have a task/action item on a page and check it off when the page is in view mode (not publish). The check (or uncheck) status is saved when leaving the page.
However if I place it within an excerpt, checking it off does not save (when I navigate to another page and come back).
Is this expected behavior or an issue?