Animating QGraphicsDropShadowEffect's blurRadius is jittery on PyQt5.13 and up

import sys
from PyQt5.QtCore import QPropertyAnimation
from PyQt5.QtGui import QPainter, QColor
from PyQt5.QtWidgets import QApplication, QGraphicsScene, QGraphicsView, QGraphicsDropShadowEffect

def main(argv):
    app = QApplication(argv)
    view = QGraphicsView()
    view.setRenderHint(QPainter.Antialiasing)
    scene = QGraphicsScene(view)
    view.setScene(scene)
    item = scene.addEllipse(30, 30, 40, 40)
    item.setBrush(QColor(0, 0, 0, 255))
    effect = QGraphicsDropShadowEffect()
    effect.setOffset(0, 0)
    item.setGraphicsEffect(effect)
    anim = QPropertyAnimation(effect, b"blurRadius", effect)
    anim.setStartValue(0)
    anim.setEndValue(50)
    anim.setDuration(1000)
    anim.setLoopCount(-1)
    anim.start()
    view.show()
    return app.exec()

if __name__ == "__main__":
    sys.exit(main(sys.argv))