>I use openSUSE Leap 42.3 Plasma and the Oxygen Theme. This is not acceptable >and scares every new user who uses KDE on Linux.
I agree but must point out that this also happens on MSWin and even on Mac (though it hasn't happened to me there for years). I've had it on a pre 14.3.x Plasma4 desktop, and got the impression then that it helped to lock the icons in place. >To reconstruct the icons I copy a saved version from >.config/plasma-org.kde.plasma.desktop-appletsrc >and login again. But this does not fix the problem until the next login. What you can do is run a script that restores the file at some appropriate, early-enough moment. That could be your .login script or a plasma startup script, or even through xinit. Good luck...
