I've been using WeekPlan for a couple of months. I turned PRO (to test PRO features) for a month a few days ago. I noticed a very annoying bug which I faced several times before turning PRO as well.
Some times, not all the times, I will add a couple of tasks in WeekPlan which is open in a tab on my browser. I will go about my business through the day and leave, putting my computer to sleep. The next day I will refresh the WeekPlan tab only to find that the tasks I had added are no longer there. It happened very recently. Yesterday, I added a couple of very important tasks in my urgent+important quadrant (from the quadrant view), and checked off some previously added tasks. Today when I refreshed the page, it asked me to relogin. Upon getting back in, the tasks I had added were gone and those I had checked were unchecked.
This is very frustrating. After trying so many options, I've finally found a tool I have managed to integrate with my life and work. These issues are sharp thorns poking me to get off.
Customer support service by UserEcho