Is this a new install or did this configuration work for you previously? If this did work previously, was there any change around the time this started?
It happend after I changed Roon Server from Ubuntu VM to Unraid docker. I think something happened in unautorize/autorize process. When uninstalling the IOS remote spp and install it again, I see available Roon Servers, choosing one the app freezes as shown in picture.
I hav uninstalled, done hard reset and restart on the Iphone several times.
It seems that it was some leftovers from an old Dockers install which caused the problem. Removing everything and installed fresh IOS remote app is ok. I will do restore and hopefully it will still work.