Three.js stiky object

Questions
1

Hello!!!
when turning left or right on the arrows, the object remains in place, although it should turn along with the camera.
What did I miss?

2

In Safari, Firefox, Chrome and Opera (all on macOS) the yellow sphere rotates along with the black ground plane. I don’t see a problem.

3

1111Безымянный
1111Безымянный2537×601 35.3 KB

arrow left arrow right. Sphere stays in the center instead of turning with the camera

4 
sphere.position.set(
          camera.position.x - 5 * Math.sin(camera.rotation.y),
          camera.position.y - 0.5 ,
          camera.position.z + 5 * Math.cos(camera.rotation.y)
     );

this will rotate the sphere with the cam and keep it at distance 5 from it.

Your formula was not polar coordinate system rotation.