Gneo is designed to help you prioritise so you can take action with your to-dos. As such, we have a clever feature called 'Follow up' that helps you to focus on what you need to get done right now. From the list view, you can swipe from left to right to follow up a task in 1,3 or 5 days.
If you have View Options set not to show Follow up tasks (the top right three buttons) and you swipe from left to right accidentally it may look like your task has disappeared. In order to see the task again, select to see Follow up tasks from View Options and you will see the task again on your list.
To remove the follow up status from your task swipe from left to right again and you can change the status to 'Follow up Now'