Wrong Shell for user and $SHELL value

The default shell of my user somehow changed to /bin/sh even though it's set in /etc/passwd to /bin/bash.

I can't seem to be able to change it to any other value, I mean I can change it but the set value is not taken into account.

Changing it with chsh makes no difference.

$ echo $BASH $SHELL
/bin/sh
$ grep user /etc/passwd
user:x:1000:1000:User,,,:/home/user:/bin/bash
$ chsh
Password: 
Changing the login shell for user
Enter the new value, or press ENTER for the default
    Login Shell [/bin/bash]: /bin/bash
$ echo $BASH $SHELL
/bin/sh
$ su root
Password: 
root@elitebook1:/home/user# echo $BASH $SHELL
/usr/bin/bash /bin/bash
root@elitebook1:/home/user# 

Apparently logging out was necessary for the change to be taken into account. Issue solved!