FriendlyUrl route /rss for AssetPublishers not working

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.2.X, Master
• Fix Version/s: 7.0.0 DXP FP95, 7.0.10.15 DXP SP15, 7.0.X, 7.1.10 DXP FP20, 7.1.10.5 SP5, 7.1.X, 7.2.10 DXP FP8, 7.2.10.3 DXP SP3, 7.2.X, 7.3.5 CE GA6, 7.3.10 DXP GA1, Master
• Component/s: Content Display Widgets > Asset Publisher widget
• Labels:
  • ee-ts
  • liferay-dxp-70-sp15
  • liferay-dxp-71-sp5
  • liferay-dxp-72-sp3
  • liferay-fixpack-de-95-7010
  • liferay-fixpack-dxp-20-7110
  • liferay-fixpack-dxp-8-7210
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/liferay-echo/liferay-portal/pull/1891

Steps to reproduce:

Add an Asset Publisher portlet to a page
Asset Publisher configuration -> Setup -> Subscriptions. Enable RSS Subscription
Asset Publisher configuration -> Setup -> Display Settings -> SET AND ENABLE -> ENABLE -> subscribe

At the Asset Publisher Portlet, click on the RSS icon:
the URL is something like this:

http://localhost:8080/web/guest/home?p_p_id=com_liferay_asset_publisher_web_portlet_AssetPublisherPortlet_INSTANCE_VbdZ6yZOEqcb&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_resource_id=getRSS&p_p_cacheability=cacheLevelPage&_com_liferay_asset_publisher_web_portlet_AssetPublisherPortlet_INSTANCE_VbdZ6yZOEqcb_currentURL=%2Fweb%2Fguest&_com_liferay_asset_publisher_web_portlet_AssetPublisherPortlet_INSTANCE_VbdZ6yZOEqcb_portletAjaxable=true

Add the RSS Publisher portlet and configure it with the previous URL. It works!
If I visit this URL we are able to obtain the friendlyURL that is something like this:
http://localhost:8080/web/guest/home/-/asset_publisher/VbdZ6yZOEqcb/rss

If I configure the RSS portlet with this friendly URL:

(/)Expected behaviour:
On previous versions like 6.2 this friendlyURL woks

(x)Real behaviour:
on DXP 7.0, 7.1 and 7.2
A portlet error with the following:

http://localhost:8080/web/guest/home/-/asset_publisher/VbdZ6yZOEqcb/rss cannot be found.