inside a kitchen cabinet can be alittle greasy and grimy due to its inherent nature.
Sounds like the paint is just NOT sticking to certain spots and maybe these spots were not thouroughly cleaned before painting? Just an idea.
Your comment about why not occuring in a general manner is well founded.
Inside kitchen cabinets are just like outside kitchen cabinets and especially paneling around light switches. Hand oils and any chemicals or oils applied to the hand usually wind up abound switches and cabinet handles.
If this oil is not CUT before hand or before the primer is applied, its like water on a ducks back.
I am focused in on oils on the wood especially where the paint is easily coming off.
Clean with a good grease and oil cutter, like white vinegar and water or any good super strength cleaner, 409 or others.