No one knows why. Eggs just are not all the same. And I do like deviled eggs, so I get ticked if they look gnarly...
Perhaps it has to do with modern feeds used in egg factories. I have noticed that eggshells of grocery-store eggs seem to be much thinner now than they used to be, but I can’t figure out why that should make the membrane stick to the white.
Eggs that we get locally are more like what I remember. I wouldn’t mind keeping a few chickens, but my wife is firmly opposed.