puppetlabs/iis : iis_application resource unable to recognise application nested in subfolder of a site

Basic Info
Module Version: 4.2.1
Puppet Version: 2017.2.3
OS Name/Version: Server 2012 R2

Describe your issue in as much detail as possible...
iis_application resource is unable to recognise existing application nested in a site subfolder.
Steps to reproduce

1. Create new IIS site named "test"
2. Create subfolders named "SubFolder/IISApp" in "test" root folder
3. create new IIS application

   iis_application { 'IISApp':

   ensure => 'present',

   applicationpool => 'DefaultAppPool',

   applicationname => '/SubFolder/IISApp',

   authenticationinfo => {

   'iisClientCertificateMapping' => false,

   'clientCertificateMapping' => false,

   'anonymous' => true,

   'basic' => false,

   'windows' => false

   },

   enabledprotocols => 'http',

   physicalpath => 'C:\inetpub\Test\SubFolder\IISApp',

   sitename => 'test',

   }

4. Run puppet apply to create new iis application called IISApp

   Notice: Compiled catalog for nt9y5wgj3zdmx4p.delivery.puppetlabs.net in environm

   ent production in 0.19 seconds

   Notice: /Stage[main]/Main/Iis_application[IISApp]/ensure: created

   Notice: Applied catalog in 4.25 seconds

5. Run puppet apply again. It is showing corrective changes and attempt to create the same IISApp application which should not be the case

   Notice: Compiled catalog for nt9y5wgj3zdmx4p.delivery.puppetlabs.net in environm

   ent production in 0.16 seconds

   Notice: /Stage[main]/Main/Iis_application[IISApp]/ensure: created

   Notice: Applied catalog in 4.14 seconds

6. Run puppet resource iis_application. Note the name of the application *test\SubFolderIISApp*, it is missing one backslash.

   iis_application { 'test\SubFolderIISApp':

   ensure => 'present',

   applicationpool => 'DefaultAppPool',

   authenticationinfo => {

   'iisClientCertificateMapping' => false,

   'clientCertificateMapping' => false,

   'anonymous' => true,

   'basic' => false,

   'windows' => false

   },

   enabledprotocols => 'http',

   physicalpath => 'C:\inetpub\Test\SubFolder\IISApp',

   sitename => 'test',

   }

Desired Behavior:
Step 5 should not recreate new iis application that already exists
Step 6 should display the iis application name as *test\SubFolder\IISApp*,