PyQT5: Worker thread's progress bar only updates after main thread's progress bar has updated [duplicate]

This is a simplified code from one of my projects, I'm trying to update one progressbar from inside main thread and another from a worker thread. In actual project, main progress bar represents directory being scanned, and worker thread extracts data from certain files and saves to database.

I can not seem to figure out a way that these two progressbars function independent of each other. Worker progressbar only starts mving when main has reached 100%

import sysfrom PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QLabel, QProgressBarfrom PyQt5.QtCore import QObject, pyqtSignal, QThread, QTimerimport timeclass Worker(QObject):    progressChanged = pyqtSignal(int)    def __init__(self):        super().__init__()    def repeat_process_decoded_instances(self):        counter = 0        total_counts = 100        while counter < total_counts:            counter += 0.5            percentage = round(counter / total_counts * 100)            self.progressChanged.emit(percentage)            time.sleep(0.1)class MyWindow(QWidget):    def __init__(self):        super().__init__()        self.worker = Worker()        self.initUI()    def initUI(self):        layout = QVBoxLayout()        self.progress_label1 = QLabel("Main Thread Progress:")        self.progress_bar1 = QProgressBar()        layout.addWidget(self.progress_label1)        layout.addWidget(self.progress_bar1)        self.progress_label2 = QLabel("Worker Thread Progress:")        self.progress_bar2 = QProgressBar()        layout.addWidget(self.progress_label2)        layout.addWidget(self.progress_bar2)        self.setLayout(layout)        self.setWindowTitle("Dual Progress Bars App")        self.show()        self.worker.progressChanged.connect(self.updateProgressBar2)        self.worker_thread = QThread()        self.worker.moveToThread(self.worker_thread)        self.worker_thread.start()        QTimer.singleShot(0, self.worker.repeat_process_decoded_instances)    def updateProgressBar2(self, percentage):        self.progress_bar2.setValue(int(percentage))def main():    app = QApplication(sys.argv)    window = MyWindow()    count = 0    total_counts = 100    while count < total_counts:        count += 2        percentage = round(count / total_counts * 100)        window.progress_bar1.setValue(percentage)        time.sleep(0.1)    sys.exit(app.exec_())if __name__ == "__main__":    main()