Re: Plasma keeps losing most of my desktop environment settings
This is probably because of something that you are doing. But I am unable to guess what.
I'll just note that I set my desktop to startup from a saved session. Then I set it up the way that I like, and save that session.
The default it for Plasma to save things as you logout, and restore them on login. So what you get depends on what your desktop looked like at your last logout.
openSUSE Leap 15.2; KDE Plasma 5.18.5;