I have the Artisan but this is for all dual head printers.
Sometimes the printer prints a lead line + skirt (or brim or whatever you choose) for both filaments, but sometimes it only prints from the main filament. In my case, 1 of my nozzles is for support material, but since that nozzle didn’t get a skirt it missed about 15 seconds of the first layer. It seems to be omitting the second skirt on larger models - maybe because the small models don’t have time to get the second filament up to temp quick enough.
I specifically want to know how to tell Luban to print a skirt for both materials. (Don’t talk to me about helpers/prime towers). The “Build Plate Adhesion Type” under Initial Layer Adhesion is not available for a material marked as support. See below (Left Extruder is PLA, Right Extruder is breakable support PLA):
EDIT I can only put one picture as a new poster so Left Extruder image not included.