requestApplicationWake closes after 2 minutes of inactivity

if you have it, try commenting out the getGlanceView function in your AppBase, so it's just a normal device app.

Thanks for the reply :)

The App.mc code looks like this, i don't actually use the getGlanceView but getInitialView, i don't know how to bypass this inactivity timeout ..

import Toybox.Application;
using Toybox.System;
using Toybox.Background;
using Toybox.WatchUi as Ui;
using Toybox.Application.Storage;

(:background)
class App extends Application.AppBase {
  function initialize() {
    AppBase.initialize();
  }

  // onStart() is called on application start up
  function onStart(state) {
    if (Background has :registerForPhoneAppMessageEvent) {
      Background.registerForPhoneAppMessageEvent();
    }
  }

  // onStop() is called when your application is exiting
  // send on close message to app
  function onStop(state) {
    var isPhoneConnected = Storage.getValue("phoneConnected");
    if (isPhoneConnected && BackgroundServiceDelegate.getCanSendMessage()) {
      TimerDelegate.sendCloseMessage();
    }
  }

  // Return the initial view of your application here
  function getInitialView() {
    return [new TimerView(), new TimerDelegate()];
  }

  function getServiceDelegate() {
    return [new BackgroundServiceDelegate()];
  }

  function onBackgroundData(data) {
    BackgroundServiceDelegate.setCanSendMessage(true);
    TimerDelegate.populateProtoData(data);
    Ui.requestUpdate();
  }
}

function getApp() {
  return Application.getApp();
}

In the manifest, do you have widget or watch-app as the app type?  Try watch-app if that's not the case..