Thanks Claude....Unfortunately I am only seeing these crashes via Xcode->Organiser->crashes from real users so I cannot see the actual String that caused the URL problem. There are two variable parts in the NSString which depend on what happened previously but these should be simple letters or numbers with no funny characters. But even if there were funny characters my expectation is that URLWithString would return nil ?

Hi Quinn... thanks for the quick reply.... We only have problems with random users and cannot repeat on our own devices. We are trying to get more info by installing a Testflight version on one of these users. I was just shocked to recently discover the statement "In iOS, using sockets directly using POSIX functions or CFSocket does not automatically activate the device’s cellular modem or on-demand VPN". So just to be clear in your view you think that is not a problem now? In fact most of the time we open the BSD socket because we have received a VoIP Push over the cellular so presumably Cellular is still activated? Thanks again Quinn!

Yes i see it is still happening with released Xcode 14.0

Ive tried this now with Ventura 13.0.1 on same M1 Mac and still same There were no VoIP Pushes to start an incoming call. I am getting notifications for missed calls etc but no VoIP Pushes Callkit does not seem to work so I get no Audio. It is never activated... However rather strangely when I start an outgoing call the Mac Opens the FaceTime App! Anybody having similar experiences with iOS VoiP Apps on M1 Macs?

Hi lehrian... Unfortunately I'm not a DTS Engineer so I have no solution. But just to say I downloaded your sample project and I do see the same flurry of constraint warnings but the CSV file is displayed. I was going to do this myself to submit a bug report so you saved me the work:-) Lets hope there is some feedback soon