Open Radar

 
Summary:
When responding to a text or iMessage, if the phone is turned into landscape view, the keyboard will sometimes become unresponsive, and the screen may go completely black, requiring a lock and unlock to restore the screen.

Steps to Reproduce:
1. Open the Messages app
2. Rotate the iPhone left or right into landscape.
3. Sometimes the keyboard will become unresponsive or the screen may go completely black.

Expected Results:
The keyboard should remain responsive and the screen shouldn't black out.

Actual Results:
The keyboard becomes unresponsive or the screen may black out.

Version:
iOS 8 and iOS 9

Notes:
The problem seems to go away when the Raise to Listen setting is turned off.

In addition to the screen blacking out, the phone will sometimes simultaneously record a 0:00 to 0:01 audio message when the audio messages button has not been pressed.

What seems to trigger the bug is blocking the sensor near the top of the iPhone 6 with your hand.  While the sensor is blocked, the keyboard fails to respond, but if you move your hand away from the sensor, the bug doesn't occur.

Configuration:
iPhone 6 16GB

Attachments:
NONE