we just made some test on our Holo2 batch using Vuforia last Unity 2020.3 Demo.
As you can see from the Attached zip video file, we found the stability of the Hologram spawned quite unsatisfying.
We used the astronaut.
This makes us think, because our real world Scenario will be a little different.
We plan to use an image as a marker and then spawn a real, real big object (something like 20meters x 20 meters) and we are wondering about stability issues with such a big object with Vuforia.
Edit: i saw some issues with OpenXR. We used only Windows Mixed Reality.
Thanks for clarifying issues and giving us some tips/solutions