can not get windows dark -> light switch, but macOS is OK

[lucasjinreal]

Hi, I have a same logic like this:

if (brightness == InterfaceBrightness.dark) {
                            brightness = InterfaceBrightness.light;
                          } else if (brightness == InterfaceBrightness.light) {
                            brightness = InterfaceBrightness.dark;
                          } else {
                            brightness = InterfaceBrightness.dark;
                          }
                          bool v = brightness == InterfaceBrightness.dark;
                          // aboutBloc.setForceDark(v);
                          if (v) {
                            Get.changeTheme(themeDataDark);
                          } else {
                            Get.changeTheme(themeData);
                          }
                          print('[brightness] crt brightness: ${brightness}');
                          this.setWindowEffect(WindowEffect.acrylic,
                              brightness == InterfaceBrightness.dark);

...

void setWindowEffect(WindowEffect value, bool dark) {
    Window.setEffect(
      effect: value,
      color: this.color,
      dark: dark,
    );
    if (Platform.isMacOS) {
      if (brightness != InterfaceBrightness.auto) {
        Window.overrideMacOSBrightness(
            dark: brightness == InterfaceBrightness.dark);
      }
    }
    this.setState(() => this.effect = value);
  }

the printed out brightness is dark and light when switch.

But the setWindowEffect can not make window to bright. While same code on macOS is ok.

what'sthe problem here?