project_key: JBEPP

How to reproduce : 
1/ enter a private page + get parameters in the browser, like :
http://localhost:8080/ecmdemo/private/acme/editor?path=/repository/collaboration//sites%20content/live/acme/web%20contents/site%20artifacts/Introduce&edit=true&backto=/ecmdemo/private/acme
(that's an example of editing link we could receive by mail)

you can see that just the uri is in the initialURI property :
<input type="hidden" name="initialURI" value="/ecmdemo/private/acme/editor"/>

2/ login with james for ex

3/ redirected to : 
http://localhost:8080/ecmdemo/private/acme/editor

=> it should be initial URL with all the get parameters.

GET parameters are dynamic and can change from one page to another. Thus, all the parameters should be followed.