devicesChangedEventStream on IOS ,not work!

[brotherdang]

AudioSession.instance.then((session) {
session.setActive(true);
subscription4DeviceRemoved = session.devicesChangedEventStream.listen((event) async {
if (ref.read(seriesProvider(seriesID))?.model?.viewEpisode != episode?.index || episode?.unlock == false)
return;

    var devices = await session.getDevices();
    LogUtils.printLog("eventStream 11", "devices.length = ${devices.length}");
    context.showToast("音频设备个数${devices.length}");

[brotherdang]

when I plug in or remove earphone, I can not get weather it is plug in-or-remove.

[xd-jeff]

Same problem