Video background plane has wrong aspect ratio

Hi there,

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

and

VideoBackgroundConfig with screen size of zero received, skipping config step

Unity: 2018.2.20.f1 Vuforia: 7.5.26 Xcode: 10.1 iOS: 12.1

Any ideas?

Greets and thanks Marco