Рефактор

scenes/button-flat/nine-patch-button.gd

@@ -65,7 +65,11 @@ func _enter_tree() -> void:
     $back.scale = size
     $back.material.set('shader_parameter/scale', size / Vector2(20.0, 20.0))
     $button.set_toggle_mode(true)
-    $button.connect('toggled', Callable(self, '_on_button_toggled'))
+    $button.connect('toggled', _on_button_toggled)
+
+
+func _exit_tree() -> void:
+    $button.disconnect('toggled', _on_button_toggled)
 
 
 func set_toggle_mode(val: bool):