Back and Next buttons in Player

I have removed the back and next button (and submit) in the player and created my own back and next buttons, however when I revisit a quiz or text interaction screens the next and back buttons are shown in the player frame. This confuses my users as they have 2 sets of back and next buttons. How can remove the back and next buttons from showing when revisiting the quiz or interaction? They have already been removed from the player frame settings, please help as it's making my eLearn look poor quality. Thanks 

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