Hello Apple SwiftUI / Swift Charts Engineering Team, I am writing to report a layout regression regarding Swift Charts in iOS 27. The anchor property on AxisValueLabel has stopped honoring the .topLeading layout coordinate, whereas it functions perfectly in iOS 26. Bug Description: To prevent the first label on a bottom X-axis from clipping past the left screen edge, a .topLeading anchor is applied. In iOS 27, this specific anchor alignment is completely ignored. The chart falls back to a standard top-center alignment, causing the initial boundary label to clip off-screen. Core Code Snippet to Reproduce: struct XAxisAnchorBugView: View { let dates = [ Calendar.current.date(from: DateComponents(year: 2026, month: 10, day: 1))!, Calendar.current.date(from: DateComponents(year: 2026, month: 10, day: 2))! ] var body: some View { Chart(dates, id: .self) { date in LineMark(x: .value("Date", date), y: .value("Value", 100)) } .frame(height: 300) .padding() .chartXAxis { AxisMarks(preset: .aligned, position: .bottom, values: .stride(by: .day, count: 1)) { value in AxisTick() let currentAnchor: UnitPoint = { guard let currentDate = value.as(Date.self) else { return .top } // BUG: .topLeading layout anchor parameter is completely ignored on iOS 27 return (currentDate == dates.first) ? .topLeading : .top }() AxisValueLabel(format: .dateTime.month(.abbreviated).day(), anchor: currentAnchor) } } } } Steps to Reproduce: Render an X-axis with a .bottom position. Assign anchor: .topLeading strictly to the first axis element's label. Run on an iOS 26 simulator (the first label anchors its top-left corner correctly, preventing edge clipping). Run on an iOS 27 simulator (the .topLeading anchor is ignored, reverting to standard top-center alignment). Expected Behavior: AxisValueLabel should position its layout bounding box using the .topLeading anchor point when specified. Actual Behavior: The layout engine ignores the .topLeading parameter on iOS 27, causing the boundary text to shift left and clip. Attachments: I have attached Xcode Simulator screenshots demonstrating this regression: Best regards, Soumyajit Das

Hello Apple SwiftUI / Swift Charts Engineering Team, I am writing to report a layout regression regarding Swift Charts in iOS 27. The multiLabelAlignment property on AxisValueLabel has stopped working as expected, whereas it functions perfectly in iOS 26. Bug Description: When configuring custom string values within AxisMarks using AxisValueLabel with multiLabelAlignment: .trailing, the alignment configuration is completely ignored on iOS 27. Labels fail to align text properly to the trailing edge, causing rendering layout issues for multi-line or custom text labels on the Y-axis. This exact same implementation compiles and aligns correctly on iOS 26. Code Snippet to Reproduce: swift struct YAxisAlignmentBugView: View { // data points to render the chart frame let data = [(date: Date(), revenue: 3000.0), (date: Date().addingTimeInterval(10000), revenue: 4000.0)] var body: some View { Chart(data, id: .date) { item in LineMark(x: .value("Date", item.date), y: .value("Revenue", item.revenue)) } .frame(height: 300) .padding() .chartYAxis { AxisMarks(preset: .aligned, position: .trailing, values: [12.0, 600.0, 3000.0, 6000.0]) { value in if let revenue = value.as(Double.self) { // BUG: multiLabelAlignment: .trailing is completely ignored on iOS 27 AxisValueLabel("y-(Int(revenue))", anchor: .leading, multiLabelAlignment: .trailing) } } } } } Steps to Reproduce: Render a Swift Chart containing a .chartYAxis configuration with position: .trailing. Pass a string directly using AxisValueLabel(customText, anchor: .leading, multiLabelAlignment: .trailing). Run the application on an iOS 26 simulator (text aligns properly to the trailing edge). Run the identical application code on an iOS 27 simulator. Expected Behavior: The text inside the AxisValueLabel should honor the multiLabelAlignment: .trailing parameter and align the text strings flush right. Actual Behavior: The multiLabelAlignment layout modifier is ignored on iOS 27, resulting in unexpected default left-alignment of the text strings. Attachments: I have attached screenshots from the Xcode Simulator demonstrating the regression: Please let me know if you need any further diagnostic details. Best regards, Soumyajit Das