Vuforia SDK Version: 7.1 (And 6) -

Description with steps to reproduce:

(Follow the tutorial steps to create a basic Vuforia scene. Steps 1 -2)

1. Create a new unity project
2. Add a ARCamera & Image target, configure vuforia
3. Leave the DefaultCamera in the scene
4. Disable both the ARCamera & DefaultCamera
5. Create buttons to disable/enable the ARCamera & DefaultCamera
6. Create an UWP .NET build, Package the build, Install & run the build
7. Enable the DefaultCamera, the DefaultCamera renders correctly
8. Enable the ARCamera, the ARCamera renders correctly
9. Disable the ARCamera, the DefaultCamera will now render with what seems to be inverted normals and will remain doing so Disabling the DefaultCamera before enabling the ARCamera does not seem to fix this problem.

I also tested using two regular camera's and this bug does not happen. Sample code is online at: https://github.com/Jeroenimoo0/UWPVuforiaSecondCameraBug -

Development OS (Mac OS X, Windows, Linux): Windows -

Mobile OS and Version: UWP Version 10.0.16299 Build 16299 -

Mobile Device Manufacturer and Model name: PC (Clevo P65xRP) -

Do the Vuforia Sample Applications show the same behavior?: I was not able to test this as I can't print targets right now and the samples are for Unity 2017.3. I believe it will however since the application is very basic.