The native view of control pages in HousePad simply isn't ready for prime-time yet... I have not yet had time to look into making the rendering match the web view in most circumstances (some specific things, as you have found, break the rendering process). The focus recently has been on getting Geofencing and widgets working; once that and some ease-of-setup tasks are done, I should be turning my focus to control pages. The web-based rendering inside of HousePad works very well except for popup-up actions.
Adam