Very strange. At first, I was able to download the app to my iPhone 8, and it worked just fine - even DSD. Then, it started to crash - at first after a couple of songs, then after just a minute or less. I uninstalled then reinstalled the app a bunch, but that didn’t work. I checked the connection to core under ARC settings, and it said “Not Ready” even though ARC was on and had at least communicated with the core (I could see my collection). My buddy helped me set up port forwarding on my Verizon G3100 router (1 to 55002, and 1 to 55000), and still couldn’t get it to work. Uninstalled the app re-started the phone, and re-installed. Now the app doesn’t crash but is sluggish and says, “bad connection try again”, and won’t play anything. Here is the Error in Roon: