Have tried debugging a bunch of things and I believe it's due to a volumetric video plugin Im using with my Unity 2019.2. Vuforia 8.3.8 iOS project...
Is there some sort of support for subclassing UnityAppController to have Vuforiawork with other plugins?
Note that if you are using other 3rd party plugins in your project that also overrides
the UnityAppController, you will have to resolve the conflict by subclassing one to the other,
or copying the implementations over from one to the other.