Cursor.visible issues

I currently have multiple canvases - paused, win and died.

I need the cursor to be visible on these so buttons can be pressed - it works fine on the paused menu. when escape is pressed it pops up and the cursor becomes visible.

 if (Input.GetKeyDown (KeyCode.Escape))
         {
             menuCanvas.SetActive (true);
             Time.timeScale = 0;
             Cursor.visible = true;
 
     }

However, it does not work on either of the other canvases and I can not figure out why. This is the code for the end canvas:

 void OnTriggerEnter (Collider other) {
 
             endCanvas.SetActive (true);
             Time.timeScale = 0;
             CyberSoldier.GetComponent<FirstPersonController> ().enabled = false;
             Cursor.visible = true;
 
     }

The mouse will not show up here - any idea why? Sometimes it pops up for half a second the vanishes.