We have a really serious and weird issue. Our current game is running on android and ios. On iPhone 8 (ios 11.0), the extended tracking simply doesn't work at all. While having the tracking, I slowly move the phone and as soon as the image target is out of the screen, vuforia switch from TRACKING to NO_POSE. I come back to the image target really slowly and as soon as I can see a tiny part of the image target, vuforia returns to TRACKING. I tried with both 7.5.26 and 8.0.10 and I have the exact same behavior.
The active provider is platform_sensor_fusion. I noticed that the camera focus seems disabled or weird as the picture is never auto adjusting to be sharp.
I am asking the question right now with the hope of getting some feedback early. I'll continue my investigation by switching the provider at runtime. Thank you!