Bed Leveling Filament Dots on Cold Plate

Never had this before. During the bed leveling process before the print starts, the nozzle leaves evenly spaced, faint micro dots - forming a grid when the nozzle dips down to check the bed at each segment. Is this normal?

Yes, but I’ve never noticed it transfer to the part’s base.

Thanks. Good to know. After a deep cleaning it didn’t appear, actually.