LDAP module: Impossible to login with the same UID if your DN changes

1/ In LDAP mode, with UID being the login id
2/ Take a user and login once with his UID
3/ Then you move the user to another branch of the LDAP and thus changing his DN
4/ This user cannot login anymore

5/ change the UID manually using edit object in his XWiki profile page, then he can login again but a new page is created for him
6/ or change the DN to the correct DN manually using edit object in his XWiki profile page, then he can login again with the correct profile page

I believe the correct behavior should be:

1/ his DN is automatically migrated to the new DN in his profile page and he can login transparently without manual modification