Reverse Proxy: Server not responding message in blog entry creation

I access XWiki through a reverse proxy. I set the "xwiki.home" parameter in the "xwiki.cfg". Creating a new blog entry show me a server not responding message on pressing the save button on the blog entry creation page. Dispite of that the blog entry is saved as aspected.

I see the network log that the post, saving the blog entries return the internal base url of the wiki instead the reverse proxy address:

{"links":[{"href":"http://<interalBaseUrl>/xwiki/rest/jobstatus/refactoring/create/1490170313214-559"
,"rel":"self","type":null,"hrefLang":null}],"id":"refactoring/create/1490170313214-559","request":null
,"state":"FINISHED","progress":{"offset":1.0,"currentLevelOffset":1.0},"log":null,"startDate":1490170313217
,"endDate":1490170313274}