I am having the same problem as bob123. I always ran mobilinc connect through mobilinc HD on an iPhone 7 and I just converted to the ISY portal and I cannot connect through moblilinc any longer.
My perferred ISY is set and I can access the device from portal plus Alexa working properly.
I have uninstalled the software and reset the device.
I am also running 4.5.4
Please help, Thank you