Menu: Deselects when I select hit mouse button. Can no longer navigate using keys afterwards.

Hey guys, I'm creating my first menu script. It's the menu you'd get in game for hitting the pause button.

I've been able to create a menu ui that is navigated using keys.

Now, not sure if this is a common thing or not but whenever I hit the left mouse button, my options are deselected and I have no way of selecting an option menu again.

Otherwise I'm free to navigate my menu using my keys.

Here's why I have down for my code, please feel free to offer any insight on the matter.

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.SceneManagement;
5. public class PauseMenu : MonoBehaviour
6. {
7.     public static bool GameIsPaused = false;
8.     public GameObject pauseMenuUi;
9.     void Update()
10.     {
11.         if (Input.GetKeyDown(KeyCode.Tab))
12.         {
13.             if (GameIsPaused)
14.             {
15.                 Resume();
16.             }
17.             else
18.             {
19.                 Pause();
20.             }
21.         }
22.     }
23.     void Resume()
24.     {
25.         pauseMenuUi.SetActive(false);
26.         Time.timeScale = 1f;
27.         GameIsPaused = false;
28.         Camera.main.GetComponent<PlayerCameraControl>().enabled = true;
29.     }
30.     void Pause()
31.     {
32.         pauseMenuUi.SetActive(true);
33.         Time.timeScale = 0f;
34.         GameIsPaused = true;
35.         Camera.main.GetComponent<PlayerCameraControl>().enabled = false;
36.     }
37.     public void QuitGame()
38.     {
39.         Time.timeScale = 1f;
40.         SceneManager.LoadScene("MainMenu");
41.     }
42. }
43.