Hello.

I have a fresh install of slackware64-current. I have done some minor changes but I don't think they are the cause of the problem.

I'm using xfce 4.16 and sddm from the slackware64-current iso and I have added two users to my system.
When I choose to switch user in xfce4 and switch back to my first logged in user, I get logged in to the correct user, but after a blink I get logged in to the wrong user.

Can anyone else confirm this?

I can confirm the above reported problem.

It works as expected running KDE, however, using XFCE there is a problem.

I logged into my regular user. From there, to switch user, I had to lock the second users session to get a working Switch User prompt. I have the "action buttons" on panel 1 and switch user is greyed out.

Once I had switched to the second user, XFCE worked as expected until I tried to switch back to the first user. Again, I locked the session, got the SDDM screen, clicked on the face icon for the first user, typed the password, pressed enter and wound up looking at the second users desktop. I had to logout of the second user to get back to user1.

I had a look around XFCE settings and did not find anything that might be causing the problem. I had to log out of user 2 to get back to user 1.

thanks for confirming the issue. I decided to contact security@slackware.com about this issue.