Scraping noise and quality problems on walls

I think I’ve finally found the mystery…

After swapping the nozzle,I found that the 0.2 mm and 0.6 mm nozzles deliver a perfect first layer so I have investigated more on the 0.4 nozzle

Then I found that the 0.4 nozzle uneven worn-out even if I have not printed more than 2-3 kg of filament (the printer is brand new)

I think this happened while the printer was cleaning the nozzle on the bed

I have opened a ticket

WIN_20250106_13_49_46_Pro

WIN_20250106_13_53_10_Pro

WIN_20250106_13_42_09_Pro

The hole still looks fine
WIN_20250106_14_15_50_Pro

The area where the nozzle is cleaned

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