Unexpected version of the Flash Player?

I'm debugging an AIR for iOS application from Animate CC 2015.2 that uses a BarCode ANE.

The app publishes and loads fine when using Control->Test Movie->On device via USB to install on iPhone 6 running iOS9.

However when attempting a debug (Debug->Debug Movie->On device via USB) the app launches and then freezes and occasionally I get a message in the console output of 'Unexpected version of the Flash Player'.  I don't get this output every time and I'm in contact with the ANE developer to see if they can help but does anyone know what the 'unexpected version...' warning is about?

Animate CC 2015.2

AIR 22.0.0.153 for iOS

Mac OSX 10.11.5