We're sorry to hear your issue hasn't been solved after contacting our support team. Safety of user data is our priority #1! Could you please let me know if you're still experiencing any problem with Todoist and we'll be happy to help you either here or at http://support.todoist.com/.
Todoist support was awesome, but after about a month of investigation the ultimate solution for me was to stop using stacked items -- since I have none of those, the problem doesn't exist either, and I can keep using Todoist (as I've been, for 6+ years).
