Hi,
I’m quite disappointed, my printer is around 350h of printing time and I had this issue. Ball bearings from Y axis on extruder take teheir own course and left the extruder I started to verify fixation of other ball bearings and I doscovered that none of them was tighten. The screws were loose flagship model with this quality… printer is not working 3 days of printing project is waiting. Waste of the time.
Piotr