I'm not quite sure what to call this defect, but its been giving me a hard time for the past few months on my R2's. Best way I can describe it is a 'delamination' while printing the outer wall, and the filament doesn't stick in a small spot. (photo attached) No consistency or repeatability to this defect either, though it seems to happen about once every 3 or 4 hours of print time. It happens on multiple models, with outer wall speeds between 20mm/s and 80mm/s. I'll run the same part and every 3rd or 4th part made on the same machine, same gcode, same filament, will show this defect. Filament: Polymaker Polylite PETG (observed in all colors) Filament: 3D Universe PETG (observed in all colors) Slicers: Seen this in both Cura 4.6.x, 4.7.x, 4.8.0 beta, and Simplify3D 4.1.2 Any ideas? Much appreciated, thanks.