so here are my discoveries why Plasma was crashing on me
- Steam env Runtime was creating problems on Plasma
I had on startup of my pc
env STEAM_RUNTIME=1 /usr/bin/steam %U -silent
(this run steam with runtime enable in silent mode)
As I have found out this was causing me this issue of Plasma going black screen or otherwise "breaking" plasma
I dont know why this "env" is causing such problems
I have found out that the correct command to run steam with run time is much more simple
steam %U -silent -runtime
it has been more than a day now with 0 crashes
2, About System Settings on Plasma i didnt found any solution why it crashes.
It seems that you can make it crash If you click on menus on different settings very very fast...
Anyway is not a big deal...
Thats all for now...