When I login to opensuse/KDE, I normally expect the desktop layout with a
folder view widget.

After installing 42.2 (clean install, no save user settings), and login:

The layout was folder-view, with icons for HOME and TRASH directly on the
desktop.  There was no folder-view widget.

I changed all of that.  I switched to "Desktop" layout.  I changed the
wallpaper.  I added a "folder view" widget.  It all looked good.

Then I logged out, and logged in again (without rebooting).  And it had
reverted to the initial settings (folder view layout, no widget, default
wallpaper).

Other desktop settings worked ('focus follows mouse', settings for "konsole"
(this still has to be set twice), number of virtual desktops).  Those settings
were not lost on logout/login.  But the layout, wallpaper and widget are all
lost.

This might be an upstream issue.  But I figure that you want to know about it
here.