White screen when running app on ipad pro

[kaitlynhwang]

Ipad pro 11. 13.3 software version Xcode Version 11.3.1 (11C504)

May be an issue with XCode. I got a white screen but changed the backgroundColor to blue to see if layout was set up correctly. self.faceView.backgroundColor = .blue

and then I removed self.trackingView.isHidden = true in func setupFaceTracker()

Then all good. Rerunning with it NOT removed worked as expected. Don't know why hiding and showing the trackingView makes the app runs as expected.