I do have the ISY on a static address. Have always had a static adders. I do have a the address space split into reserved for static devices, have several, and assignable by DHCP. When I switch to the UDI for smart home skill Alexa is able to find all my devices, just can't command any of the devices. Based on other comments I think I need to get the Mobilink skill removed. If you see in one of my other comments the username (email) and password I use to log in to this forum does not work.