Failure behavior solved. It was a threading safe issue. Driver.Wakeup () moved to the Post method on MainLoopSyncContext class solved it.

Terminal.Gui/Core.cs

@@ -1726,6 +1726,7 @@ namespace Terminal.Gui {
 			{
 				mainLoop.AddIdle (() => {
 					d (state);
+					mainLoop.Driver.Wakeup ();
 					return false;
 				});
 			}

Terminal.Gui/MonoCurses/mainloop.cs

@@ -354,10 +354,9 @@ namespace Mono.Terminal {
 		/// </summary>
 		public Func<bool> AddIdle (Func<bool> idleHandler)
 		{
-			lock (idleHandlers) {
+			lock (idleHandlers)
 				idleHandlers.Add (idleHandler);
-				driver.Wakeup ();
-			}
+
 			return idleHandler;
 		}