It was also the second away defeat for the champions, beaten by Desportivo Nacala by a similar scoreline in the season opener last March.
The Beira-based club has managed just five points from a possible 15, and is languishing at the bottom rungs of the standings, eight points behind surprise leaders, Songo, who beat Chingale 1-0 to open up a three point lead at the top. Songo remain unbeaten.
In yet another surprising result of the fifth week, Chibuto moved to second after overcoming Ferroviario de Maputo 1-0, to take their point tally to ten.
Maxaquene were also held to a shocking barren draw by visiting Desportivo Nacala.