Why use of xCode Storyboard causes Vuforia camera view to flip

There appears to be a history of this issue from a few years ago, but thus far i haven't found a precise answer.

The AR app is build on Unity 2019.2.

In Xcode if i select to use the preferred xCode Storyboard instead of the older XIB approach, we have a very strange behavior. If the device is held in Portrait, and is rotated 90 degrees clockwise to landscap, the camera remains right side up. But upon rotating back to portrait the camera view flips upside down. Then if i rotate 90 degrees CCW, to landscape, the camera view remains upside down, but returning back to portrait, the camera returns to rightside up.

What is so perplexing is that if i don't use the Storyboard, and instead the older XIB file, then the camera orientation is maintained.

Any guidance where to look for a solution would be very helpful.