Still happening for me as well...
$ gnome-shell --version GNOME Shell 3.28.2
$ gdm3 --version GDM 3.28.2
$ uname --all Linux PS006 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 18:02:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release --all No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 18.04 LTS Release: 18.04 Codename: bionic
Still happening for me as well...
$ gnome-shell --version
GNOME Shell 3.28.2
$ gdm3 --version
GDM 3.28.2
$ uname --all
Linux PS006 4.15.0-23-generic #25-Ubuntu SMP Wed May 23 18:02:16 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
$ lsb_release --all
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04 LTS
Release: 18.04
Codename: bionic