They are just getting old.
No problem with eating it.
If your eggs are getting old then check if the unboiled egg floats in water.
If it does float at the top, throw it out.
If it sits at the bottom, standing up and hardly touches the bottom of the jar, then hard boil them or make sure they are cooked well.
If they sit properly at the bottom, then do with it whatever you want. Soft boiled, bavarois. whatever