We have the same problem with iOS26 - thousands of crashes in the production. iOS 18 and older works just fine. We are not able to reproduce it locally. It started with building our app with xcode 26, with older xcode it woks ok even on iOS 26, but we were unable to do iOS 26 specific code. Fatal Exception: NSInvalidArgumentException +[_SwiftUILayerDelegate _screen]: unrecognized selector sent to class 0x1efa9da08 0 CoreFoundation 0xc98c8 __exceptionPreprocess 1 libobjc.A.dylib 0x317c4 objc_exception_throw 2 CoreFoundation 0x1656cc -[NSObject(NSObject) doesNotRecognizeSelector:] 3 CoreFoundation 0x464f8 ___forwarding___ 4 CoreFoundation 0x4e3a0 _CF_forwarding_prep_0 5 UIKitCore 0x18e7880 __35-[UIViewKeyframeAnimationState pop]_block_invoke 6 CoreFoundation 0x12170 __NSDICTIONARY_IS_CALLING_OUT_TO_A_BLOCK__ 7 CoreFoundation 0x1a47cc -[__NSDictionaryM enumerateKeysAndObjectsWithOptions:usingBlock:] 8 UIKitCore 0x18e76bc -[UIViewKeyframeAnimationState pop] 9 UIKitCore 0x1d0e8 +[UIViewAnimationState popAnimationState] 10 UIKitCore 0x1905c44 +[UIView(UIViewAnimationWithBlocks) _setupAnimationWithDuration:delay:view:options:factory:animations:start:animationStateGenerator:completion:] 11 UIKitCore 0x1907334 +[UIView(UIViewKeyframeAnimations) animateKeyframesWithDuration:delay:options:animations:completion:] ...

I've have a problem with VPN since macos 15 upgrade, I have M$ Defender too and once I've build our project using xcode, once it finished, it always disconnect VPN, it restarts whole network system and everything was gone, I was unable to deploy to a real device, and I was unable to keep alive VPN for simulators. However after whole day investigation I've found a workaround, just not to use WiFi instead of it I found in the drawer the old a USB Ethernet and a USB A->C reduction ... and now everything work just fine!! So seems to be broken only wifi subsystem, so from my point of view, it is definitely an apple bug.