Was getting multiple positioning failure alerts from the roborock s6 vacuum this evening after cleaning my family room where my 3 and 1 year old were playing. No matter how many times I had the robot dock with the home button, room cleaning was not working and positioning failure would occur. Turned over the robot and opened the brush compartment. A large unbended paper clip was inside interfering with the roller brush. As soon as I removed this everything was back to normal. ☺️ Now the robot is working great again! Be ware of caught objects generating this error code!