Useradd working differently between versions

LXD
3

OK docs wanted:

  1. previously setup where userID works and x2g0 works
memyself@debianserver:~$ lxc exec deb-recordkeeping bash
root@deb-recordkeeping:~# su memyself
memyself@deb-recordkeeping:/root$ exit
  1. version where ubuntu:trusty is used
    this is where the container was set up quite some time ago with the user being added (useradd) today for testing purposes. userid shows correctly (container setup in lxd 2.xx with useradd done in lxd3.0) but this is an ubuntu container whereas most of mine are not ubuntu based.
memyself@debianserver:~$ lxc exec ubuntu-robotics bash
root@ubuntu-robotics:~# su memyself
memyself@ubuntu-corobotics:/root$ exit
  1. container and userID using lxd2.xx, accessed today using lxd3.0 for testing purposes.
memyself@debianserver:~$ lxc exec deb-horde-server bash
root@deb-horde-server:~# vi /etc/passwd
root@deb-horde-server:~# su memyself
$ exit

I was using vi /etc/passwd to make sure that the user was listed in the correct location.

TIA