Tasks still very broken

Every single day when I go back to my tasks to mark them off, I see that they are still marked off from the night before, even though I marked them off before the day reset at all. It makes it unusable when I actually need to keep track of what I've done so far and need to mark off stuff. Also, occasionally when I go back to the app after marking a task off, it's back to unmarked as if I didn't do anything with the app at all.