Buggy animation

[gerchicov-bp]

    func loadDeterminate() {
        self.progressButton.stopIndeterminate()
        self.progressButton.resetProgress()
        let timer = Timer.scheduledTimer(timeInterval: 1,
                                         target: self,
                                         selector: #selector(self.animateDeterminate),
                                         userInfo: time,
                                         repeats: true)
        RunLoop.current.add(timer, forMode: .defaultRunLoopMode)
    }
    
    @objc func animateDeterminate(sender: Timer) {
        if self.progressButton.progress >= 1.0 {
            sender.invalidate()
        }
        else {
            self.progressButton.setProgress(progress: self.progressButton.progress + CGFloat(0.1), false)
        }
    }

I need to update the button rarely. So I replaced some numbers in your example, ran it on iphone 5s simulator, choose "determinate" and clicked this buttom:
1)timer's step is 0.1, its value is changed from 0 to 1. So why does it show 8 steps instead of 10?
2)if you do some clicks on button (or other clickable elements) - animation is changed unpredictably