I think i solved my own issue, for those who need it in the future. I am using this solution in the PreferencesViewModel to ignore setting the user defaults import Foundation class PreferencesViewModel: ObservableObject { @Published var maximumDistance: Double = UserDefaults.standard.value(for: .maximumDistance) as? Double ?? PreferencesViewModel.maximumDistanceOptions[0] { didSet { //Check if running in preview mode #if DEBUG if ProcessInfo.processInfo.environment["XCODE_RUNNING_FOR_PREVIEWS"] == "1" { print("Preview mode detected. Not saving to UserDefaults.") return } #endif UserDefaults.standard.set(maximumDistance, for: .maximumDistance) } } ```