State Machine: Cannot switch states on second state enter

I have the following code in my grounded state, which works perfect on its first enter, it can be switched to any other state I want, but after entering in the grounded state for the second time, the player gets stuck in this state. Any idea why would that happen?

 using UnityEngine;
 
 public class PlayerGroundedState : PlayerBaseState
 {
     public PlayerGroundedState(PlayerStateManager currentContext, PlayerStateFactory playerStateFactory) 
     : base (currentContext, playerStateFactory) {
         IsRootState = true;
         InitializeSubstate();
     }
 
     public override void EnterState() {
         Debug.Log("grounded state; landed = " + Ctx.Landed);
         Ctx.CurrentMovementY = Ctx.GroundedGravity;
         Ctx.AppliedMovementY = Ctx.GroundedGravity;
     }
 
     public override void UpdateState() {
         CheckSwitchStates();
     }
     
     public override void ExitState() {}
     
     public override void CheckSwitchStates() {
         if(Ctx.IsJumpPressed && !Ctx.RequireNewJumpPress) {
             SwitchState(Factory.Jump());
         }
         else if(Ctx.IsFalling) {
             SwitchState(Factory.Fall());
         } 
     }
     
     public override void InitializeSubstate() {
         if(!Ctx.Landed) {
             SwitchState(Factory.Land());
         }
         else if(Ctx.IsMovementPressed) {
             SetSubState(Factory.Run());
         } 
         else {
             SetSubState(Factory.Idle());
         }
     }
 }

My abstract class

 public abstract class PlayerBaseState {
     private PlayerStateManager _ctx;
     private PlayerStateFactory _factory;
     private PlayerBaseState _currentSuperState;
     private PlayerBaseState _currentSubState;
     private bool _isRootState = false;
 
     protected bool IsRootState { set { _isRootState = value; } }
     protected PlayerStateManager Ctx { get { return _ctx; } }
     protected PlayerStateFactory Factory { get { return _factory; } } 
 
     public PlayerBaseState(PlayerStateManager currentContext, PlayerStateFactory playerStateFactory) {
         _ctx = currentContext;
         _factory = playerStateFactory;
     }
 
     public abstract void EnterState();
 
     public abstract void UpdateState();
     
     public abstract void ExitState();
     
     public abstract void CheckSwitchStates();
     
     public abstract void InitializeSubstate();
 
     public void UpdateStates() {
         UpdateState();
         if (_currentSubState != null) {
             _currentSubState.UpdateStates();
         } 
     }
 
     protected void SwitchState(PlayerBaseState newState) {
         ExitState();
         newState.EnterState();
 
         if(_isRootState) {
             _ctx.CurrentState = newState;
         } else if (_currentSuperState != null) {
             _currentSuperState.SetSubState(newState);
         }
     }
 
     protected void SetSuperState(PlayerBaseState newSuperState) {
         _currentSuperState = newSuperState;
     }
 
     protected void SetSubState(PlayerBaseState newSubState) {
         _currentSubState = newSubState;
         newSubState.SetSuperState(this);
     }
 }