I made a universal app using SpriteKit and Swift. Users have sent out bug reports on iOS 9 where sprite node images are showing up white/blank. But I haven't been able to reproduce this in the simulator. The images that don't show up are all device-specific in images.xcassets.
The images that do show up are the ones that are universal in images.xcassets.
What could I do to solve this (besides making them not device-specific) and could this possibly be an XCode/iOS bug?