Update process not started lauching the program by shortcut or taskbar-item

MarosK  - Thank you for starting the request. Until this issue is resolved, one workaround would be to leverage the Package AutoUpdater class to check for an update at a given frequency. You can examine the xml at the remote install location to parse out the new version number, (unfortunately the version # is missing from the api). An alternative to parsing the package xml would be to create a text file during the CD process with the version number in it.

using Windows.ApplicationModel;
using Windows.Management.Deployment;        

...

	private async Task CheckForUpdateAsync()
        {
            var update = await _currentPackage.CheckUpdateAvailabilityAsync();

            if (update.Availability == PackageUpdateAvailability.Available || update.Availability == PackageUpdateAvailability.Required)
            {
                try
                {
                    _timer.Enabled = false;

                    var packageLocation = GetPackageUrl();
                    var deploymentResult = await _packageManager.UpdatePackageAsync(packageLocation, null, DeploymentOptions.ForceApplicationShutdown);
                }
                catch (Exception ex)
                {
                    _logger.Info("An error occurred while attempting to update the package: " + ex.Message);
                }
          }

        private Uri GetPackageUrl()
        {
            const string mainBundleNodeName = "MainBundle";
            const string uriAttributeName = "Uri";

            var appInstallerUri = Package.Current.GetAppInstallerInfo().Uri.ToString();
            var xmlDoc = XDocument.Load(appInstallerUri);
            var defaultNameSpace = xmlDoc.Root?.GetDefaultNamespace();
            var mainBundleNode = xmlDoc.Descendants(defaultNameSpace + mainBundleNodeName).FirstOrDefault();
            var packageUri = mainBundleNode?.Attributes().FirstOrDefault(x => x.Name == uriAttributeName)?.Value;

            return new Uri(packageUri ?? string.Empty);
        }

        private void GetCurrentPackage()
        {
            try
            {
                var userSecurityId = WindowsIdentity.GetCurrent().User?.ToString();
                _currentPackage = _packageManager.FindPackageForUser(userSecurityId ?? string.Empty, Package.Current.Id.FullName);
            }
            catch (InvalidOperationException)
            {
                _logger.Info("The running application does not have a package identity, which indicates the process is not executing from an installed application.");
            }
        }

        private async void HandleTimedEventAsync(object source, ElapsedEventArgs e)
        {
            if (_currentPackage == null)
            {
                return;
            }

            await CheckForUpdateAsync().ConfigureAwait(true);
        }