When I run Krunner using the ALT+space shortcut and select a app to run, the app is launched with a totally different window theme and font configuration .
For example, I use the dark theme in my desktop and when the app is launched from krunner, the app is showed using the light theme and a much smaller font size.
But if I run krunner from the start menu all works nicely.
I’m having this problem as well. While restarting KRunner does fix it, this isn’t a persistent fix. Did you figure out how to make it work after rebooting?