The console was printing the following: Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored. Please fix this problem. If you want to see the backtrace, please set CG_NUMERICS_SHOW_BACKTRACE environmental variable. I did that and received the following: Error: this application, or a library it uses, has passed an invalid numeric value (NaN, or not-a-number) to CoreGraphics API and this value is being ignored. Please fix this problem. Backtrace: <CGPathAddLineToPoint+80> <+[UIBezierPath _continuousRoundedRectBezierPath:withRoundedCorners:cornerRadii:segments:smoothPillShapes:clampCornerRadii:] <+[UIBezierPath _continuousRoundedRectBezierPath:withRoundedCorners:cornerRadius:segments:]+184> <+[UIBezierPath _roundedRectBezierPath:withRoundedCorners:cornerRadius:segments:legacyCorners:]+340> <-[_UITextMagnifiedLoupeView layoutSubviews]+1256> <-[UIView(CALayerDelegate) layoutSublayersOfLayer:]+2420> <_ZN2CA5Layer16layout_if_neededEPNS_11TransactionE+424> <_ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE+132> <_ZN2CA7Context18commit_transactionEPNS_11TransactionEdPd+484> <_ZN2CA11Transaction6commitEv+636> <_ZN2CA11Transaction25flush_as_runloop_observerEb+68> <_UIApplicationFlushCATransaction+48> <__setupUpdateSequence_block_invoke_2+356> <_UIUpdateSequenceRun+76> <schedulerStepScheduledMainSection+204> <runloopSourceCallback+80> <__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__+24> <__CFRunLoopDoSource0+168> <__CFRunLoopDoSources0+220> <__CFRunLoopRun+780> <CFRunLoopRunSpecific+536> <GSEventRunModal+164> <-[UIApplication _run]+796> <UIApplicationMain+124> <$s7SwiftUI17KitRendererCommon33_ACC2C5639A7D76F611E170E831FCA491LLys5NeverOyXlXpFAESpySpys4Int8VGSgG <$s7SwiftUI6runAppys5NeverOxAA0D0RzlF+180> <$s7SwiftUI3AppPAAE4mainyyFZ+148> <$s4Takt0A3AppV5$mainyyFZ+40> <__debug_main_executable_dylib_entry_point+12> 104fd93d4 10516c924 I also confirmed that it's only occurring on SectorMark and this is in an iOS 18.5 sim.

It stopped updating as expected, but then decided to work again after about 15 minutes. I have the following code in the timeline that I thought would work, but didn't. let refresh = calendar.date(byAdding: .second, value: 1, to: entries.last!.date)! return Timeline(entries: entries, policy: .after(refresh))