Does this happen with a specific device and OS? Can you please send a video that shows the behaviour, so we can see the environment this is happening in (e.g. if you try to 'extend' the tracking against a very structureless enviroment the tracking will be lost more easily, then in a 'noisy' environment).
Thx and greetings
I am using Unity 2018.3.8f1 and the Wikitude SDK 8.3, and extended tracking is not working well at all. I tried just having a marker and a cube, and the cube bounces around and sometimes initializes in different positions and rotations. I've tried going back to Unity 2017 and the previous Wikitude SDK, but experienced the same thing.
Any ideas to fix this? Could there be another setting I am missing? Unfortunately, the regular tracking option is too shaky for our use case, so we need extended tracking.