This is exactly why I decided to switch to stretched icons with images AND text instead of the full-screen versions in the first place – while on a touch-enabled device, it is more difficult to have a logical and intuitive way to combine showing user the label and making the icons clickable. So far I can only think of one possible solution – disable icon labels on tablets and hope that the user understands the meaning of the icon button from its icon image. What do you think?
Best,
Andrew / Satori Studio