Hi!
We experiance major issues with Vuforia on Test Flight builds. We utilize Vuforia 5 and OpenGL rendering, on typical developer builds or even enterprise distribution builds everything works fine, images are tracked correctly and rendering works fine but when we build the app to the Test Flight nothing is recognized or rendered, just a plain video preview.
I have found this thread: https://developer.vuforia.com/forum/vuforia-40/vuforia-423-unity-465p4-il2cpp-32bit-crash&sort=2 and tried to disable optimization and somehow it helps, image tracking started working but it does not work well, I have to try couple of times to "catch" the image, also animation now does not work, only the last stage is visible.
Unfortunately, I cannot share any code but I believe it is based on sample available on website.