The same thing happened to me. I had picked the first rare which was lhurgoyf, but it appeared to me that my pick was a white card of cost 3. It has affected me completely in the subsequent choices leaving the deck quite worse. At the end of the draft, it gave me an error and closed the app. When I opened the app and I went back to the draft, the deck formation appeared again, and with the lhurgoyf between the cards of the deck.
The same thing happened to me. I had picked the first rare which was lhurgoyf, but it appeared to me that my pick was a white card of cost 3. It has affected me completely in the subsequent choices leaving the deck quite worse. At the end of the draft, it gave me an error and closed the app. When I opened the app and I went back to the draft, the deck formation appeared again, and with the lhurgoyf between the cards of the deck.