C# GameObject Reverses Z Rotation

I have a script that is suppose to make a gameobject rotate along the Z axis towards the mouse. However when I rotate the gameobject somewhere between 70 and 120 degrees it reverses it's rotation. I'm not sure why as I haven't given my script that kind of functionality. Any idea how I can fix this?

 using UnityEngine;
 using System.Collections;
 
 public class Rotate : MonoBehaviour {
     public float sensitivityZ = 15;
     
     void Update () {
             float rotationZ = Input.GetAxis("Mouse Z") * sensitivityZ;
             transform.RotateAroundLocal( gameObject.transform.forward,Mathf.Deg2Rad * rotationZ );
     }
 }