Won't Shoot if Y Rotation Value Is Negative

My program allows a player (which the main camera) to shoot balls in the direction the camera is angled/facing. This works except when the y rotation value of the camera is a negative number.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class CameraController : MonoBehaviour {
 
     public float speed;
     public GameObject projectile;
     public GameObject hit_object;
 
     private Vector3 moveDirection = Vector3.zero;
 
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         Vector3 pos = transform.position;
         pos.y = 3;
         transform.position = pos;
 
         if (Input.GetKey(KeyCode.RightArrow))
         {
             transform.localPosition += transform.right * Time.deltaTime * speed;
         }
         if (Input.GetKey(KeyCode.LeftArrow))
         {
             transform.position += -transform.right * Time.deltaTime * speed;
         }
         if (Input.GetKey(KeyCode.DownArrow))
         {
             transform.position += -transform.forward * Time.deltaTime * speed;
         }
         if (Input.GetKey(KeyCode.UpArrow))
         {
             transform.position += transform.forward * Time.deltaTime * speed;
         }
 
         if (Input.GetKeyDown(KeyCode.F))
         {
             GameObject bullet = Instantiate(projectile, transform.position, transform.rotation);
             bullet.GetComponent<Rigidbody>().AddRelativeForce(new Vector3(0, 0, 4000));
         }
 
         if (Input.GetKeyDown(KeyCode.E))
         {
             var pos_x = transform.position.x + Random.Range(-500F, 500F);
             var pos_z = transform.position.z + Random.Range(-500F, 500F);
             Instantiate(hit_object, new Vector3(pos_x, transform.position.y, pos_z), transform.rotation);
         }
 
         transform.Rotate(0f, Input.GetAxis("Horizontal") * speed * Time.deltaTime, 0f, Space.World);
         transform.Rotate(-Input.GetAxis("Vertical") * speed * Time.deltaTime, 0f, 0f, Space.Self);
     }
 }

This happens regardless of the size of the sphere (has Rigidbody component) or the current position of the camera.

As you can see, the balls that were fired went towards the top of the field based on the snippet view which is a direct result of the balls fired at a y-rotation value from 0 to 180 and rolling away due to physics. There are no balls at the bottom of the screen since if the rotational y value is negative, the balls will be shot at 0 or 180 degrees, whichever is closer.

How do I allow balls to be fired even if the rotational value of y is negative? The y-value mentioned: