During the unscheduled maintenance on August 20th we deactivated the Visitors Stage 2. However, there is now an issue with Stage 1’s non-attacking alien mobs crowding out regular mobs in almost all maps. Many Maplers expressed difficulties with the game due to this bug. Please be assured that our developers are looking for a resolution right now, and we will keep you updated when more information is available. We sincerely apologize for the inconvenience and thank you for your patience.