Нашёл причину утечки памяти

Assets/Code/Debug/SceneChooser.cs

@@ -22,10 +22,6 @@ namespace Code.Debug
             _stateMachine.SwitchState((AppStates)id);
         }
 
-        public void SwitchGameplay()
-        {
-            _stateMachine.SwitchState(AppStates.Gameplay).AllowStateTransition(AppStates.MainMenu);
-        }
         public void SwitchPlatformer()
         {
             _stateMachine.SwitchState(AppStates.Platformer).AllowStateTransition(AppStates.MainMenu);