switch controlling transform

Hello everyone, I'd like to ask for help with a little issue

I'm having. What I'm trying to do is have a script that will rotate an

object based on mouse input. I'd also want to switch the

transform I'm doing the rotation on to a different object's

during run time. I'm having an issue with my script, when I press the button to

switch to another object's transform, it works fine. but when I press button to go back to the previous transform,

it's X rotation is immediately changed to 90.:confused: This

also happens if let's say I'm on object 1 and I press key to go

to object 1. I've been looking over this for a while now, I'm just not sure

what I'm doing wrong. Thank you in advance !!

 public class TestRotateSwitch : MonoBehaviour 
 {
     public Transform transCur;
     public Transform ref1;
     public Transform ref2;
     
     private float xrot;
     private float xRotCur;
     public float xrotspeed;
     private float _ref_X_Velocity;
     
     
     private float yrot;
     private float yRotCur;
     public float yRotSpeed;
     private float _ref_Y_Velocity;
     
     
     
     void Start () 
     {
      transCur = ref1;
     }
     
     void Update () 
     {
         if(Input.GetKeyUp (KeyCode.Q))
         {
             yrot = ref1.rotation.eulerAngles.y;
             xrot = ref1.rotation.eulerAngles.x;
             yRotCur = yrot;
             xRotCur = xrot;
              transCur = ref1;
             transCur.rotation = ref1.rotation;
             
         }
         if(Input.GetKeyUp (KeyCode.E))
         {
             yrot = ref2.rotation.eulerAngles.y;
             xrot = ref2.rotation.eulerAngles.x;
             yRotCur = yrot;
             xRotCur = xrot;
             transCur = ref2;
         }
      yrot += yRotSpeed * Time.deltaTime * Input.GetAxis 
 
 ("Mouse X");//InputManager_IG.MovingStick.StickPosition.x ;
         
         xrot -= xrotspeed * Time.deltaTime * 
 
 Input.GetAxis ("Mouse 
 
 Y");//InputManager_IG.MovingStick.StickPosition.y ;
         
         xrot = Mathf.Clamp (xrot,-90,90);
         
         yRotCur = Mathf.SmoothDamp (yRotCur,yrot, ref 
 
 _ref_Y_Velocity,0.000001f);
         
         xRotCur = Mathf.SmoothDamp (xRotCur,xrot, ref 
 
 _ref_X_Velocity,0.000001f);
         
         transCur.rotation = Quaternion.Euler (new 
 
 Vector3(xRotCur,yRotCur,0));
     }
 }