SDDM (Login Window) Settings don't stick

As the title says I tried to change the background from the boring default on the login window and it appears to work, even asks for the admin password and authenticates but at logout or restart it goes back to the default. Is this a bug or a feature?

Solution

yes but has to be changed upstream by SDDM themselves and they are planning to change it, we do not have an ETA on this