I have read that the Bambu filaments do not guarantee with same thickness very well compared to other manufacturers (0.03mm instead of 0.02mm tolerance) and this could play a factor with small nozzles. I had in mind to try other manufacturers, but they are not so easily available for similar price in my area, so I have postponed it until I finish my current project, but I am keeping it in mind.

I should probably buy some calipers and actually measure it.