Button onClick delegate with toggling method assignment

I am trying to create a UI Button which switches its onClick action between two different handlers whenever it is clicked.

Example: - Button handler: Open panel - Click - Panel opens. Handler changes to: Display message - Click - Message displays. Handler changes to: Open panel

Here is my demo code:

 using UnityEngine;
 using UnityEngine.UI;
 
 public class ButtonWithTwoActions : MonoBehaviour 
 {
     public Button button;
 
     private delegate void ButtonAction();
     private ButtonAction _buttonAction;
 
     void OnEnable ()
     {
         _buttonAction += ActionOne;
         button.onClick.AddListener( () => _buttonAction() );
     }
 
     void OnDisable ()
     {
         button.onClick.RemoveAllListeners();
     }
     
     void ActionOne()
     {
         // Perform action 1
 
         _buttonAction -= ActionOne;
         _buttonAction += ActionTwo;
     }
 
     void ActionTwo()
     {
         // Perform action 2
 
         _buttonAction -= ActionTwo;
         _buttonAction += ActionOne;
     }
 }

My problem: _buttonAction is called and calls Action 1. Action 1 needs to toggle the handler to a different method, but as soon as I do this, Action 2 gets called in the same frame, which I don't want. I only want it to be assigned to the delegate, so Action 2 gets called the next time I click my button.

Thanks for any suggestions! I'd also be happy to try different approaches as long as my button has two separate handlers which swap with every click.