The problem happens on simulator with iOS 16 for me. But on physical devices, it works as expected, the return of speechVoices is not empty. It may be a bug only on simulator with iOS 16?

We've just tested on: packaged by Xcode 15 Beta and running on iOS 17 beta real device. It works. So, I think there's a compatible problem for iOS 17 Beta? We haven't ready to migrate to Xcode 17, hope this will be fixed in later iOS 17 beta versions.

As iOS 17 Beta 5 is just released, we have a good news. The crash has been disappeared on the newest os. Thus, the problem seems to be fixed