Examinating the Gcode for the retraction option (1 mm) I've found following code:
G92 E0
G1 X54.827 Y112.327 F12000.000
G1 F1800.000 E1.00000
However I expected E-1.0000 (negative) after G92 E0, something like this:
G92 E0
G1 X54.827 Y112.327 F12000.000
G1 F1800.000 E-1.00000
What am I missing?