For AD users(having home-directory set on AD), sometimes incorrect home-directory is assigned

Issue

• For AD users(having home-directory set on AD using UnixHomeDirectory), sometimes incorrect home-directory(set in sssd.conf using fallback_homedir) is assigned:

[root@test]#  getent passwd ad_user
ad_user:*:1377430742:1377400513:ad_user:/home/test_ad_user:/bin/bash <----- Expected ("UnixHomeDirectory" is set to '/home/test_ad_user' on AD)

[root@test]# su - ad_user
Last login: Thu Mar 23 10:14:02 CET 2017 on pts/0

[root@test]$ logout

[root@test]#  systemctl restart sssd         

[root@test]#  getent passwd ad_user     
ad_user:*:1377430742:1377400513:ad_user:/home/ad_user:/bin/bash  <----- Unexpected ("fallback_homedir" set in 'sssd.conf' is assigned)

[root@test]#  sss_cache -u ad_user

[root@test]#  getent passwd ad_user
ad_user:*:1377430742:1377400513:ad_user:/home/test_ad_user:/bin/bash <----- Expected