Paul-G

I assume that too, it occurs rarely and is fixed by simply re-slicing.

Ok it happened again and this time I saved the gcode. Preview shows layer 377 printing directly on the build plate. Cura should have been fully updated at the time of each of these errors respectively. Hopefully this is just a visual bug but I'm not about to test that as it would seriously mess my printer up if the nozzle tried to push through the print like that. CE5_Skull_Part_01_ZAxis_Bug_At_Layer_377.gcode

I did not save the gcode unfortunately I just re-sliced to fix it. Guess that would have been helpful. No plugins, just vanilla cura. Could be a display error but the preview actually drew the entire layer like that so I wasn't about to risk it. I tried re-slicing a few times but I couldn't replicate the error. I've attached the file and the gcode I ended up with after re-slicing, don't know if you can get anything from that. Back.gcode Drone_Back_Half_fixed.STL

This was random, it fixed its self when re-sliced. Would have been an epic print failure if I hadn't noticed, would potentially have damaged the printer.