I am experiencing a similar problem also on an iPad 4. Screen is frozen on "Choose a weapon or item to bury", has happened on two different characters, also after being defeated by a summoned Goblin Raider. Exiting the app does not help, when the app is restarted and "continue" selected the game simply returns to the same frozen screen. Similar results if the entire iPad is restarted, though I can select other characters (who have the same message regardless of whether they have fought the Goblin Raider) and select other options (like settings or vault, which activate but then return to the frozen screen upon exit). I have forfeited one game, but when encountering the Goblin Raider the next time, the same thing happens.
I see that there has not been an official reply to the original post here, I'm sure we both would appreciate a response. I did search the forums for similar posts but would be happy to be directed to one if there is a solution listed somewhere.
allison_r