Maps corrupted, markers moved, spilt room area overflew

My Dreame L10 Prime had created a proper map when I started using it. I even modified it for segregation of rooms and section and has added no-go zones and virtual walls. Now over period of time, it has moved from its original positions. Even map function itself adds color codes to different rooms, that is also getting overflow to adjacent rooms. This is creating problem as Vaccum cleaner when asked to clean room needs to go other room also for the portion which has moved beyond wall.

Has anybody observed this behaviour?

Hi, this may happen over a period of time if the Lidar sensor gets dirty in turn confusing the robot. You can use soft cotton ear buds to clean the sensor lens. Once done, you can restore the map if it was backed up. Else, you can remap the house.