I have the following difficulty. My eLearning course is developed in storyline. In my course the default previous and next buttons are customized only in the design aspect. And in the Knowledge Check slide the "When Revisiting state" is set to "Resume Saved State". Now on the iPad when I click back/previous button, on the interactive slides the customized next and back buttons are overlapped by the Default next and previous buttons. Note that I have only hidden the default back and next buttons in order to use the customized next and back buttons. It doesn't give this error in the desktop, but only in the iPad.