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My Xcode Cloud builds are failing intermittently with network issues when download SPM dependencies. In particular today was the facebook SDK binaries, which does exist as I tested separately:. Kind of annoying, as there isn't anything I can do to resolve this I think. failed downloading 'https://github.com/facebook/facebook-ios-sdk/releases/download/v14.0.0/FBSDKCoreKit-Static_XCFramework.zip' which is required by binary target 'FBSDKCoreKit': downloadError("Error Domain=NSURLErrorDomain Code=-1005 \"The network connection was lost.\" UserInfo={NSURLSessionDownloadTaskResumeData={length = 7045, bytes = 0x62706c69 73743030 d4010203 04050607 ... 00000000 00001adf }, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDownloadTask <9ABA1AD6-45B3-48E7-BC6C-A8CD11DA5E14>.<3>, _NSURLErrorRelatedURLSessionTaskErrorKey=(\n    \"LocalDownloadTask <9ABA1AD6-45B3-48E7-BC6C-A8CD11DA5E14>.<3>\"\n), NSLocalizedDescription=The network connection was lost., NSErrorFailingURLStringKey=https://objects.githubusercontent.com/github-production-release-asset-2e65be/738491/36b15867-27f1-4ac5-8c79-fffc1a9cfd4a?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20220705%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20220705T074918Z&X-Amz-Expires=300&X-Amz-

For a GET request which is consistently the same, I'm returning in the response this response header. Cache-Control: max-age=3600, private I'm creating a URLSession with this configuration. Basically, ensuring my cache is large. The URLSession persists throughout the life of the app and all requests go through it.  var configuration = URLSessionConfiguration.default           let cache = URLCache(memoryCapacity: 500_000_000,                                diskCapacity: 1_000_000_000)         configuration.urlCache = cache         configuration.requestCachePolicy = .useProtocolCachePolicy I create a data task with the completion handler: let task = session.dataTask(with: request) { data, response, error in //... my response handling code here } task.resume() There isn't anything complicated or unusual I'm doing. I've used this code for years, and I'm now trying to optimise some calls with a caching policy. So I have 2 issues: Requests that have no-cache policy are still being saved into the URLCache. Which I've confirmed by looking into URLCache.shared.cachedResponse . Why is it caching them when the response explicitly states no-cache policy and I've told the session to use the protocol policy. On the request where I do want to use the cache, when I call session.dataTask on subsequent times, it never fetches from the cache. It always hits the server again - which I can confirm from the server logs. What piece of this am I missing here?