I'm currently facing a very similar issue while testing an application I work for under iOS 16. It's intermittently crashing with little to no debugging information available, even on debug builds. From what I've been researching it might be related to os_unfair_lock_lock misbehaving on iOS 16, but it happens under unpredictable conditions. Would love to be able to provide more info but I'm stumped. Has anyone faced something similar?