Keybinding does not work in python-mpv when using it together with pyside6

Question

I use the library https://github.com/jaseg/python-mpv to control the mpv player, but when using it together with pyside6, keybindings do not work (player doesn't accept input totally). What am I doing wrong? or is it impossible to use them when embedding in pyside6? (If I run the player with the same arguments without embedding, everything works fine)

import os
os.add_dll_directory(os.getcwd())
import mpv
from PySide6.QtWidgets import *
from PySide6.QtCore import *
mpvfolderpath = f"mpv.net/portable_config/"
import sys
class Test(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.container = QWidget(self)
        self.setCentralWidget(self.container)
        self.container.setAttribute(Qt.WA_DontCreateNativeAncestors)
        self.container.setAttribute(Qt.WA_NativeWindow)
        player = mpv.MPV(wid=str(int(self.container.winId())),
                         vo="gpu",  # You may not need this
                         log_handler=print,
                         loglevel='debug',
                         input_default_bindings=True,
                         input_vo_keyboard=True)

        @player.on_key_press('f')
        def my_f_binding():
            print("f работает!")
        player.play('test.mp4')

app = QApplication(sys.argv)

# This is necessary since PyQT stomps over the locale settings needed by libmpv.
# This needs to happen after importing PyQT before creating the first mpv.MPV instance.
import locale
locale.setlocale(locale.LC_NUMERIC, 'C')
win = Test()
win.show()
sys.exit(app.exec_())