Platform: iOS 26 RC / Xcode 26 RC Component: UIKit - UITextField Description: When typing a Japanese character (or other IME input) as the first character in a UITextField and then losing focus (by pressing Enter or tapping elsewhere), the character is incorrectly duplicated. This issue only happens in iOS26 beta. Steps to Reproduce: Create a UITextField with shouldChangeCharactersIn delegate Switch to Japanese keyboard Type "あ" (or any hiragana character) Press Enter or tap outside the text field Observe the character count becomes 2 instead of 1 Expected Result: Character count should remain 1 Actual Result: Character is duplicated, count becomes 2 Sample Code: func shouldChangeText( in range: NSRange, replacementText string: String, maximumNumberOfCharacters: Int, regexValidation: String? = nil) -> (String, Bool) { guard let stringRange = Range(range, in: currentText) else { return (currentText, false) } if let regex = regexValidation, string != "", // delete key !string.room.checkPattern(regex) { return (currentText, false) } let changedText = currentText.replacingCharacters(in: stringRange, with: string) let allowChange = changedText.utf16.count <= maximumNumberOfCharacters print("=== stringRange: \(stringRange), currentText: \(currentText), replacementText: \(string) changedText: \(changedText), allowChange: \(allowChange) ===") guard !allowChange else { return (changedText, allowChange) } // Accept text deletion even if changedText count is more than maximumNumberCharacters guard !string.isEmpty else { return (changedText, true) } insert(text: string, maximumNumberOfCharacters: maximumNumberOfCharacters) return (currentText, allowChange) }