you mentioned: AMS loaded with Bambu black, Bambu blue matte, Sunlu red pla+, bambu yellow matte
is that the correct sequence ? Black -> Blue -> Red -> Yellow in the AMS ? as loading this in BS the sequence comes up as:
yes, i printed black-blu-red-yellow. I din't remember the poaition in the AMS but it is not relevant. you assign the color when you set "change filament" in bambulab (or any other slicer).
happy printing.