Unpredictable number pad behavior on iPad with Xcode 26

NumberPadTestApp.swift

// If built with Xcode 16, the text fields present the full keyboard with
// numbers on the top row. This has been the default iPadOS behavior for as long
// as I can remember.

// If built with Xcode 26, a number pad popover is shown initially but if the
// text field is tapped again or the cursor is moved, the full keyboard shows
// instead. On subsequent taps into a text field, it's a toss-up whether you get
// the popover or the full keyboard.

import SwiftUI

@main
struct NumberPadTestApp: App {
  var body: some Scene {
    WindowGroup {
      NumberPadDemoView()
    }
  }
}

struct NumberPadDemoView: View {
  @State private var text: String = ""
  
  var body: some View {
    VStack(spacing: 40) {
      
      // Title
      Text("iPadOS Number Pads")
        .font(.largeTitle)
        .padding(.top, 100)
      
      // SwiftUI
      VStack(alignment: .leading, spacing: 10) {
        Text("SwiftUI TextField (.numberPad)")
          .font(.system(size: 32))
          .foregroundColor(.blue)
        
        TextField("", text: $text)
          .keyboardType(.numberPad)
          .font(.system(size: 32))
          .textFieldStyle(RoundedBorderTextFieldStyle())
      }
      
      // UIKit
      VStack(alignment: .leading, spacing: 10) {
        Text("UIKit UITextField (.numberPad)")
          .font(.system(size: 32))
          .foregroundColor(.green)
        
        SimpleUIKitTextField()
          .frame(height: 36)
      }
      
      Spacer()
    }
    .padding()
    .background(Color(UIColor.systemGroupedBackground))
  }
}

// MARK: - UIKit Text Field Representable
struct SimpleUIKitTextField: UIViewRepresentable {
  func makeUIView(context: Context) -> UITextField {
    let textField = UITextField()
    textField.keyboardType = .numberPad
    textField.borderStyle = .roundedRect
    textField.font = .systemFont(ofSize: 32)
    return textField
  }
  
  func updateUIView(_ uiView: UITextField, context: Context) { }
}