I have a very strange issue. When printing a part with only one nozzle. After some time the UM3 automatically cleans the unused nozzle. That's okay typically this happens after layer 20 or whatever. But when I print a part with a very big initial area the cleanup process starts at the second layer.
Then the head moves back to change the nozzles and crashes/scratches the plate, in addition it gets stuck to the backward holding clips. After a lot of rattling it gets back working but already missed some steps because of the stucks and the second layer differs in position to the first l