Currently when I am editing a task, and then navigate to another view using the side menu, then any changes I already made in the task are simply ignored without warning.
To avoid accidentally losing small or large changes that way (and not even noticing it), Everdo should show a confirmation dialog when any changes have already been made and the user is moving away from the edit page. That dialog should ask to either save or cancel.
I stop counting the number of times it happened to me: writing something and clicking somewhere else either to look for some information or intentionally to close the edit window (default behavior with Google Keep that I am also using, for instance). Then I lose everything; this is very frustrating!