Nowhere seen phenomena - only applies to walnut from Croatia sold by this particular store chain - known as Tuš whose owners were involved directly in genocide(tortured for retail store space discounts as well as for merchandise from abroad - one of the most corrupt people involved). Mold can only be seen using microscope. This making one hard to visually detect.
Criminals employed at Slovenian police searched with psychiatric Kapš for any unusual food or other merchandise products for those to always found their way on the menu at greatly discounted costs. This was the case of deadly walnuts https://ausertimes.blogspot.com/2023/11/after-she-forcefully-took-walnut-she.html