When trying to run Vuforia on a device with iOS 11.3 beta installed, the screen is black and the following error appears:
ERROR/AR(52208) 2018-02-06 17:12:59: VideoBackgroundConfig with screen size of zero received, skipping config step"
This happens in a blank Unity scene with just the "ARCamera" prefab in the scene. This scene runs fine on Android and an iPhone running 11.2.5
Target OS: iOS 11.3
Devices tested: iPhone 7, iPhone 7+