Problem with llSetCameraParams in PoseBall

I am trying to make a poseball, that will move and focus an avatar's camera to the
optimal viewing of a planetarium dome.

The following script will work some of the time to move the camera when the avatar sits,
but many times leaves the camera at the default.

Is this A: a bug, or B: What am I doing wrong?

Here is the script. Though echo-checks indicate a proper flow and execution of
the code, it still many times has no effect on the camera, or sets the camera to
the wrong position.

Many thanks -Jackson

// this code runs without errors,  Flows properly,  but half the time the avatar
//   sits down camera does not set

key avid;


default
{
    
    
    state_entry()
    {
        llSitTarget(<-.5,0,0>,<0,0,0,1>); // Sits avatar in upright position
        // llSitTarget must be here for llAvatarOnSitTarget to return a key
        
        llSay(0, "Entered Default State");
    }//state_entry

    touch_start(integer total_number)
    {
        llSay(0, "Sit here!");
        
    }
    
     changed(integer change)
    {
        llSay(0, "Changed"); 
        if(change & CHANGED_LINK){ // makes sure that this is a changed link call
            llSay(0, "Changed Link"); 
            avid = llAvatarOnSitTarget();  // is an avatar sitting on the target?
            llSay(0, "Check Key"); 
            if(avid != NULL_KEY) {
                llSay(0, "Requesting Permissions");
                llRequestPermissions(avid, PERMISSION_CONTROL_CAMERA);
   
            }
            else {
               llSay(0, "Null Key");  
            }
        } // if changed Link

   } //changed

     run_time_permissions(integer p) 
         {

           if(PERMISSION_TRIGGER_ANIMATION & p) {
            llSay(0, "ANIMATION Permission Set");  
            llStartAnimation("nyanya");
            }
            
            if(PERMISSION_CONTROL_CAMERA & p) {
           
                llSay(0, "Camera Permission Set");  
                llClearCameraParams();
                llSetCameraParams([
                    CAMERA_ACTIVE, 1, // 1 is active, 0 is inactive
                    CAMERA_POSITION, <200.630,204.104,20.664> // region-relative position
                ]);
                llSay(0, "Camera Set"); 
            }// PERMISSION_CONTROL_CAMERA
        }//runtime permissions
        
        
} // default

If an agent has focussed their camera before sitting down then llSetCameraParams won't change the focus, but it will change the default camera position. Try hitting ESC a few times to see if the camera goes where you want it.

Also it is recommended to put llSitTarget on on_rez event.