Unity & Quest3: Unwanted Scene Rotation

Hi to all.

I am having a really hard time getting my scene displaying properly on Oculus Quest 3.

The scene is SUPER simple: a few objects positioned on random positions, and rotating randomly.
The scene is displaying correctly on the Game View, and also on the Oculus via Quest Link.

However, when I upload it on the Oculus (which builds succesfully), the whole scene is rotating randomly, with a lot of noise, and the head rotation controls the rotation of the whole scene.

Now, things get even more weirder as if I upload a static 3D model (the 3D environment found in the Unity’s VR template), the same scene with no other changes displays correctly.

I have tried then to hide this 3D model (so that I can have my scene displaying as intended), and first I made a transparent material for the 3D model: it does work. I then changed the size of the object; it doesn’t work.

Wouldn’t this be considered a bug?

FYI, I tried to recreate the same scene in the VR template, and I get the same wrong results.

Can someone help me to understand why the heck this is so tricky to have it displayed correctly, as in the Game View?

Thx

Which version of unity and all xr plugins are you on?
I have never seen this behaviour