I am having this EXACT same problem with my shelly1 devices on a unify network. I used an android phone, the app found the device to add to the network, but immediately on the successful notification of the device being added, the shelly DOES NOT automatically show in the "discovered devices" to add to a room. I hope we get some feedback from this because I am greatly disappointed. I am sorry you are experiencing this too, but glad to know I am not alone.