Seemingly random lines on the surface I'm getting seemingly random lines scattered across the top surface of my prints:




Printer: Anycubic i3 mega
Slicer: Cura 3.2.1
Printer chosen in Cura: Prusa i3, Gcode flavor changed to RepRap
Cura Profile: Fine, "Outer before inner walls" enabled

What might be the reason?
This is the result of travel moves passing through/over the top surface. The combing setting can prevent this type of move (for walls, infill or top), and z-hop can avoid making any mark during these travels.

Both settings will affect speed. Z-hop will be active on every layer, for example.