Setting insets with Interface Builder doesn't work – Ios swift

I followed Hacking With Swift’s Project 2 and I had very obscure (i.e. I have no clue what’s going on) issues with Interface Builder.

I’ve built the layout as described in the tutorial:

• 3 buttons, constrained to be separated by 30px from each other
• each button contains an image of a flag
• each button is 200×100 in size

When I run Resolve AutoLayout Issues, all buttons get resized to 224×114 and get a padding which can’t be removed by using Interface Builder (all insets are set to 0 and button’s content mode is set to scale to fit). This can only be resolved by applying padding by code:

button1.configuration?.contentInsets = NSDirectionalEdgeInsets.zero
button2.configuration?.contentInsets = NSDirectionalEdgeInsets.zero
button3.configuration?.contentInsets = NSDirectionalEdgeInsets.zero

I’ve compared my Storyboard with the code in HWS repository, but didn’t notice anything different.

Here is the full code:

import UIKit

class ViewController: UIViewController {
    @IBOutlet weak var button1: UIButton!
    @IBOutlet weak var button2: UIButton!
    @IBOutlet weak var button3: UIButton!
    
    var countries = [String]()
    var correctAnswer = 0
    var answeredQuestions = 0
    var score = 0
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        countries += [
            "estonia", "france", "germany", "ireland",
            "italy", "monaco", "nigeria", "poland",
            "russia", "spain", "uk", "us"
        ]
        
        button1.configuration?.contentInsets = NSDirectionalEdgeInsets.zero
        button2.configuration?.contentInsets = NSDirectionalEdgeInsets.zero
        button3.configuration?.contentInsets = NSDirectionalEdgeInsets.zero
        
        button1.layer.borderWidth = 1
        button2.layer.borderWidth = 1
        button3.layer.borderWidth = 1
        button1.layer.borderColor = UIColor.lightGray.cgColor
        button2.layer.borderColor = UIColor.lightGray.cgColor
        button3.layer.borderColor = UIColor.lightGray.cgColor
        
        askQuestion()
    }
    
    func askQuestion(action: UIAlertAction! = nil) {
        countries.shuffle()
        
        correctAnswer = Int.random(in: 0...2)
        let answer = countries[correctAnswer].uppercased()
        title = "(answer) – score: (score)"
        
        button1.setImage(UIImage(named: countries[0]), for: .normal)
        button2.setImage(UIImage(named: countries[1]), for: .normal)
        button3.setImage(UIImage(named: countries[2]), for: .normal)
    }

    @IBAction func buttonTapped(_ sender: UIButton) {
        var title: String
        var message: String
        var buttonText: String
        
        answeredQuestions += 1
        
        if (sender.tag == correctAnswer) {
            title = "Correct"
            score += 1
        } else {
            let answer = countries[correctAnswer].uppercased()
            title = "Wrong! That's the flag of (answer)"
            score -= 1
        }
        
        if (answeredQuestions >= 10) {
            message =  "Your final score is (score)."
            buttonText = "Restart"
            answeredQuestions = 0
            score = 0
        } else {
            message =  "Your score is (score)."
            buttonText = "Continue"
        }
        
        
        let ac = UIAlertController(title: title, message: message, preferredStyle: .alert)
        ac.addAction(UIAlertAction(title: buttonText, style: .default, handler: askQuestion))
        present(ac, animated: true)
    }
}

That’s how my Buttons are set up in IB: