iMessage app receives no callbacks at all if a message is selected after user scrolls to a different app

Originator:poppoppop
Number:rdar://28515522 Date Originated:28-Sep-2016 02:53 PM
Status:Open Resolved:
Product:iOS SDK Product Version:10
Classification:Other Bug Reproducible:Always
 
Summary:
iMessage app receives no callbacks at all if a message is selected after user scrolls to a different app

Steps to Reproduce:
1. Launch app from included sample project
2. Tap insert message
3. Send
4. Swipe to a different iMessage app in the app drawer
5. Tap the message in the conversation view

Expected Results:
Message app launches in expanded presentation style and we receive some kind of callback like `didSelectMessage`, `willTransitionToPresentationStyle`, or `didBecomeActiveWithConversation`.

Actual Results:
Message app launches in expanded presentation style but receives no callbacks whatsoever.

Notes:
Sample project at https://github.com/prendio2/MessageAppCallbacks

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