We've noticed that the navbar available in the section My Account (the one with My Profile, My Courses, My Orders, etc links) is not available on tablets.
We believe this is due to their css classes. The nav bar and the dropdown menu that replaces it on small viewports have this classes:
NAV BAR: hidden-phone hidden-tablet
SELECT: uk-hidden-large uk-hidden-medium
This means that on tablets, both of them are hidden.
Could this be the reason?