Multiple DFF context on hz parties are not behaving as expected.

While creating multiple context as HZ PARTY SITES level, For example ContextA, ContextB and contextC. we observed that it will just consider one context at a time, Suppose we update Context A, then existing contextB values are being vanished , Then again if we are updating contextC , context A and B both will not be appearing for that record.

It is considering on context at a time, Unable to store value for more than one context (attribute category) at site level. Please suggest.