UMO+ 1.2 mm nozzle massive overextrusion

[burdickjp 6]

I'm having trouble finding what is causing this.

I've tried in Cura 4.1 and Cura 4.2. The first layer is over extruding to line widths of over 2 mm when they should be 1.2 mm. I checked my steps per mm by extruding 100 mm of filament. It was within 2%. I corrected it.

 

I switched to a 0.8 mm nozzle and 0.6 mm layers and it seems to be behaving, so I'm thinking there's something buggy in Cura or I'm missing a setting somewhere.

UMO_3DBenchy.3mf