This happening on two gen 7 iPads for me. I find I can load and play in default mode as Steve. As soon as I login, sometimes it freezes logging in, other times it goes to loading and then freezes. I notice the resolution on the loading screen is higher when in my avatar rather than default Steve. I would try mine in lower graphics mode if I could get to settings to change it.
This happening on two gen 7 iPads for me. I find I can load and play in default mode as Steve. As soon as I login, sometimes it freezes logging in, other times it goes to loading and then freezes. I notice the resolution on the loading screen is higher when in my avatar rather than default Steve. I would try mine in lower graphics mode if I could get to settings to change it.