REST api not showing file-based sitemap correctly

Dear all

I recently updated to Snapshot build 503. Where I got difficulties with REST api regarding sitemaps.

While calling the list of Sitemaps works as expected (REST doc):

curl -X GET --header "Accept: application/json" "http://localhost:8085/rest/sitemaps"
      Request URL
      http://localhost:8085/rest/sitemaps
      Response Body
      [
  {
"name": "home",
"label": "Townhouse",
"link": "http://localhost:8085/rest/sitemaps/home",
"homepage": {
  "link": "http://localhost:8085/rest/sitemaps/home/Aarau",
  "leaf": false,
  "widgets": []
}
  },
  {
"name": "_default",
"label": "Home",
"link": "http://localhost:8085/rest/sitemaps/_default",
"homepage": {
  "link": "http://localhost:8085/rest/sitemaps/_default/_default",
  "leaf": false,
  "widgets": []
}
  }
]
      Response Code
      200
      Response Headers
      {
  "date": "Mon, 03 Oct 2016 06:43:40 GMT",
  "content-type": "application/json",
  "content-length": "373",
  "server": "Jetty(9.2.14.v20151106)"
}

Calling the the sitemap at: http://localhost:8085/rest/sitemaps/home fails

curl -X GET --header "Accept: application/json" "http://localhost:8085/rest/sitemaps/home"
          Request URL
          http://localhost:8085/rest/sitemaps/home
          Response Body
          {
  "error": {
    "http-code": 500,
    "exception": {
      "class": "java.lang.NullPointerException"
    }
  }
}
          Response Code
          500
          Response Headers
          {
  "date": "Mon, 03 Oct 2016 06:49:56 GMT",
  "content-type": "application/json",
  "content-length": "115",
  "server": "Jetty(9.2.14.v20151106)"
}

The “_default” works.

In the same time it is possible to access the home.sitemap from basicui and classicui, but not from an external non openHAB2 UI.

Warning: file_get_contents(http://localhost:8085/rest/sitemaps/home): failed to open stream: HTTP request failed!

Kind regards
Stefan