Sometimes you need to select text in subtasks, and sometimes you may occasionally edit or delete it. And Cmd+Z doesn't work in this case and there is no way to undo this change.
Case: subtask text contains a link, you select this link to copy it and occasionally you press just C instead of Cmd+C and link is replaced with 'c', in this way the link is lost forever, there is no way to to get it back.