We use the GameSave framework to sync player save data to iCloud. Since iOS 27, our game crashes a few seconds after a cold launch, the first time it calls GameSaveSyncedDirectory.openDirectory(). We call the API only from the main actor, but the crash is on a cooperative thread inside GameSave: EXC_BAD_ACCESS (SIGSEGV) KERN_INVALID_ADDRESS at 0x400000000000bad0 libobjc.A.dylib objc_release CloudDocs initUIApplicationWillResignActiveNotification CloudDocs -[BRQuery _setQueryState:] CloudDocs -[BRQuery _runQuery] CloudDocs -[BRQuery executeWithOptions:] Foundation -[NSMetadataQuery startQuery] GameSave BundleUpdatesWaiter.initMetadataQuery() GameSave BundleUpdatesWaiter.init(bundleURL:) GameSave closure #1 in GameSyncedDirectoryHolder.allowReaders(for:)Other threads are inside the same BRQuery path at the same moment. The crash reproduces without GameSave: starting twoNSMetadataQuery objects at once on background threads in a fresh process crashes 94 times in 100 in the iOS 27.0 Simulator, and never on iOS 26.5, so this seems like a regression. Starting one query on a single thread never crashes. I've submitted a support request (FB25352978) so hopefully this will be looked at fairly soon - if anyone else runs into this it would be good to know!