Totally puzzling,, Never encountered such. I do boil my eggs so the yolks are soft,,, but my egg whites are ALWAYS FIRM.
Boil some more fresh ones, and see if same occurs
10 minutes is more than long enough to get hard boiled eggs. I do 3 minutes for my soft yolk eggs. Sometimes I use my old skool timer.
WISHING YOU BEST,,,,,,,,,,,,,,,,,,,,,,,,,
