Switching between users sometimes fails
Switching between users from menu sometimes fails on my system, and I'm getting redirected to the lock screen. Clicking user switch link on the lock screen doesn't work as well. As a workaround I use ctrl+alt+f1 keys to open gdm and than I'm able to start a new session or resume an existing one.
The bug exists on Ubuntu 18.04 and debian 9, both are fresh installs.
Thanks.