Can no longer change SDDM wallpaper?

Hi all, after an update today I’m no longer able to set a wallpaper for SDDM - or rather it looks like I can, but it still shows the default image of what appears to be a Voyager probe against a purple background. My custom wallpaper was working fine until this morning. I’m using KDE. Any ideas?

I had something similar happen, only mine went to a black background and my Galileo default wallpaper was thereafter corrupted. Had to replace it in the default location.