Mother's body after Her Mahasamadhi

Why did Mother's body saturated with the supramental force deteriorate after death? As Mother described Sri Aurobindo's golden light entering and filling Her body when He left, we can conjecture that Her consciousness spread from Her body to the physical consciousness of those who were most receptive and to humanity as a whole. The remarkable intensity and sweetness of the physical atmosphere in the Ashram from Nov 17-20, 1973 is a confirmation. The signs of supramental action in the world during the next 20 years -- End of Cold War, disarmament, birth of the EU and Internet are confirmations of its action in world affairs.