I've encountered a massive bug in my grand survival account. I was around level 47-50 but then I logged in and my level was back to zero (0). It never returned to my original level even if I closed and rerun the app. I really love this everything about this game; graphics, gameplay, story, adventure, just about everything. It's really frustrating to see that all my time grinding to get to a higher level was just wasted. I really hope that this bug will be fixed.