i am aware that this topic was briefly mentioned in some posts before, but i just want to highlight this in a separate post. With openhab3 the sitemaps in the iOS app are tending to get empty. I don´t have seen a patern yet, sometimes sitemaps work in the beginning and then stop working. Charts seem to play a role as well as frame in frame, but these are just best guesses so far. I also created a sitemap in the 3.0 UI and the sitemap code was proven to look valid, but was shown empty as well. I also created a simple one and also this one got empty. I am running out of ideas what the root cause is or a proper workaround ( other then to use the browser ).
Happy new year!