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LocalNotifications problem in android 9

hi guys
i get problem in local notification .I do not receive any notice from closed app state
i use
fuselibls 1.13.0
uno 1.12.3

<App>
    <JavaScript> 
    var LocalNotify = require("FuseJS/LocalNotifications");
    var Observable = require("FuseJS/Observable");
    var resultSendNow = Observable("");
    var resultOnReceivedMessage = Observable("");
    LocalNotify.on("receivedMessage", function(payload) {
    	resultOnReceivedMessage.value = "Received Local Notification: " + payload;
        console.log("Received Local Notification: " + payload);
   
    });

    function sendLater() {
        LocalNotify.later(5, "Finally!", "4 seconds is a long time", "hmm?", true);
    }

    function sendNow() {
    	resultSendNow.value = "sendNow Called";
        LocalNotify.now("Boom!", "Just like that", "payload", true);
    }
   module.exports = {
        sendNow: sendNow,
        sendLater: sendLater,
        resultSendNow: resultSendNow,
        resultOnReceivedMessage: resultOnReceivedMessage,
    }; 
   </JavaScript>
   <DockPanel>
    <TopFrameBackground DockPanel.Dock="Top" />
    <ScrollView>
        <StackPanel>
            <Button Clicked="{sendNow}" Text="Send notification now" Height="60"/>
            <Button Clicked="{sendLater}" Text="Send notification in 4 seconds" Height="60"/>
            <Text Value="{resultSendNow}" />
            <Text Value=" r= {resultOnReceivedMessage}" />
        </StackPanel>
    </ScrollView>
    <BottomBarBackground DockPanel.Dock="Bottom" />
</DockPanel>
</App>