I am currently using KDE at the moment and the dolphin file manager is messed up when I set the theme to breeze-dark.
I am not sure how this works on the Plasma Desktop environment.
But on GTK Distros, you can disable the Global Startup of the application, then add that application to startup and run on the Users ~.profile
file.
Does Plasma D.E. utilize the ~.profile?
I don't think Plasma utilises it but I'm not sure if I'm looking at the right things...