I would want to believe this is a physical bet between you and some other person over a staked amount. If so, and you have this challenges i think it's a system error or it might as well be from your end. If truly you are good at the game, just as you said you should be able to know the controls you hold at that point where your goalkeeper comes out the goal post and try the same thing over and over again to identify the actual fault.
Haven to believe that OP is referring to Playstation console games, I think he must had been playing it at his provision where there is no house edge even though he had to play it with friends involved with a stake.
However, the problem he is trying to describe about his goalkeep must be from how gamepad where he controls his team in the match.
Probably a faulty button malfunctioning.