I have just had another one today. I had at least 2 last week, maybe more because I pickled the hard boiled eggs so didn't see inside them... But today I was peeling another batch for pickling and need 2 for my lunch so pulled a couple of freshly boiled eggs aside. Slicing it up for my lunch I came across this... If it continues then it looks like one of my new layers has a reproductive problem sadly, which means she will have a shorter laying life and could encounter medical problems along the way. These can easily be life threatening. But for now she's ok and with any luck if will settle in the next few weeks. All of my new layers are free range and organic since birth, so it's just one of those things. She does lay very long thin eggs.