I have the exact same problem. It occurs at the end of Local Heroes so I thought it might be a conflict between the fact that the closure rewards are supposed to happen and the end of the scenario occurs at the same time. Obviously not if it also happens to you. Anyway it seems I can't progress . I'm stuck with the same black screen as you.
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Device: IPad Air OS: iOS 8.4 Pass & Play: OFF Permadeath: OFF Mode: Story, [Local Heroes] Party Members: Merisiel, Seelah, Kyra Turn Order: Merisiel, Seelah, Kyra Scenario: [Local Heroes] Difficulty: Normal Wildcards: N/A Trigger: Location closure, Items Rolled, reward animation plays