I noticed that a very basic code would produce a consistent console assert while editing almost every time keyboard long press is used (e.g. long pressing a letter would bring up a list of alternatives, like u, ü, etc). text 2021-04-02 17:37:33.170756-0700 test[4255:2036410] [Assert] View (null):0x0 does not conform to UITextInput protocol Simplified code: swift import UIKit class ViewController: UIViewController { var textField : UITextField! override func loadView() { textField = UITextField() textField.text = "test" textField.frame = CGRect(x: 100, y: 100, width: 100, height: 20) let view = UIView() view.backgroundColor = .white view.frame = CGRect(x: 100, y: 100, width: 100, height: 20) view.addSubview(textField) self.view = view } } Details: running on physical device iPhone 11 Pro iOS 14.4.2 (18D70) keyboard seems to be standard also reproducible on simulator: iPhone 11 Pro, iOS 14.4 (18D46) but not happening on simulator: iPhone 11 Pro, iOS 13.7 (17H22) similar SwiftUI-based code also has the same issue Seems like a regression to me, but I'm also open to possibility of something being wrong with my specific configuration (code or otherwise). Questions: is anyone else experiencing the same issue? any workarounds / fixes?