This is happening to me, too, and I'm not even using sound. It is from a Watch Extension, though. For me, it happens when initializing an NSAttributedString... let options: [NSAttributedString.DocumentReadingOptionKey: Any] = [             .documentType: NSAttributedString.DocumentType.html,             .characterEncoding: String.Encoding.utf8.rawValue         ]                  // Try to parse input string data out as an HTML document, return input if failed         guard let attributedString = try? NSAttributedString(data: inputStringData, options: options, documentAttributes: nil) else {             return false         }