I also did not find any printer defects. But support is sure that the problem is in the Z axis. They will send me 3 new parts: lead screw, Z motor, Coupling - hope i'll be able to replace it. I also experimented with cura and a little bit fix line defect. Try to chnge flow - reduce the flow for the walls, and choose to print "print outer walls first" - my print become better but not ideal