Splash screen on iOS is stretched

The splash screen on the iPhone 6s is stretched when loading. Tested alongside the iPhone 5s and the Samsung Galaxy Note 2 for comparison. The stretching only occurs on the 6s.

iPhone 6s: 6240_iPhone6S (; 9.1.0)
iPhone 5s: 5065_iPhone5S (; 9.2.0)
Samsung Galaxy Note 2: 2894_GalaxyNote2_SCH-I605 (;ARM Mali-400 4.1.1)

1. Create a new blank project
2. Launch project onto iOS device

Result: The splash screen is stretched more than it should be on the 6s.
Expected: The splash screen should not be stretched.

iPhone 6s Plus Launch image using portrait as landscape

iPhone 6s Plus Launch image using portrait as landscape

Packaging for iOS fails with "Cannot create because a file with the same name already exists."

4.10 low quality graphics on iPhone6S

iPhone 6s Plus Launch image using portrait as landscape

iPhone 6s Plus Launch image using portrait as landscape