Cameroon manager Hugo Broos was left confused by the latest incident involving the Video Assistant Referee (VAR) in his side's 3-1 Confederations Cup defeat against Germany on Sunday, and said the referee didn't give an explanation afterward.
Chile and Germany have booked their tickets for the semi-finals of the Confederations Cup in Russian Federation.
Mabouka was sent off for a high challenge on Germany midfielder Emre Can - though only after teammate Sebastien Siani was first shown a red card in an apparent case of mistaken identity.
It took protests from the Cameroon players, including Siani sarcastically applauding referee Wilmar Roldan, for the Colombian to check the replays himself on the side of the pitch in Sochi's Fisht Stadium.
But Werner restored Germany's two-goal cushion.
Cameroon were gifted a way back into the match when Marc-Andre ter Stegen let Aboubakar's header burst through his gloves in what was a poor goal to concede for the Barcelona keeper.
Vincent Aboubakar scored in the 78th minute to raise Cameroonian and African hopes after Emest Mabouka was sent off for a reckless tackle but this was short-lived as the Germans quickly responded through two-goals hero Timo Werner in the 81st minute to put the game to bed with a 3-1 final scoreline.
The victory in Sochi meant Germany finished top of Group B ahead of Chile, who drew 1-1 with Australia in Moscow.
But Werner netted again in the 81st minute to secure a 100th victory for Joachim Loew in his 150th match in charge of Germany.
Demirbay and Werner's goals were their first at worldwide level and Low added: "Players are always motivated and have developed a lot in recent years".
"Australia's all-time top-scorer Tim Cahill could win his 100th cap".
Alexis Sanchez appealed for a penalty in the 26th when he went down in the penalty area following Mark Milligan's desperate lunge, but the video review system said no foul.
They ended up with five points and second in the group.
Still stunned by that, Chile's defence was then caught cold and the ball fell to an unmarked Salisbury but the central defender blasted his shot over when it looked easier to score.
Australia threatened for the first time when Massimo Luongo forced a good close-range save from Claudio Bravo after Troisi's throughball and the Socceroos then took a surprise lead after 42 minutes.
Eugenio Mena's cross was only half cleared by Sainsbury, allowing Vargas' header to keep the ball alive and Rodriguez to force his effort past Ryan from six yards.
Chances were few and far between for Australia and they must now be kicking themselves for not ensuring that they have more of a chance of progressing form the group by beating the weakest side.