I'm having this issue with the Vuforia video background plane.
I'm on the new iPad Pro 11" with this wierd ratio 4.29:3 ?!??! (2388 x 1668 px).
My problem is that my video render Background plane is somehow in 16:9 (with black borders on top and bottom), the AR content is just fine.
Xcode Log says:
Cannot setMode to AR before Camera is initialized
VideoBackgroundConfig with screen size of zero received, skipping config step
Greets and thanks