In the initial mission with Ameiko and Olek, the dice weren't visible for me (on Android). Uninstalled Beta 2 before getting the new build, and confirmed the dice *are* visible in an actual mission past this. Could still see bonuses (if any) and still roll the dice after figuring out where they were, sounds still played... just no actual dice visible.

If you start the tutorial over, are the dice still invisible?  Were they invisible the whole time, or just disappear during it?

They were invisible the entire time. Never visible once. As soon as the tutorial ended and I started Brigandoom, I could see dice again.