It’s a known issue… 
I would advise monitoring that thread for any possible solutions.
A workaround appears to be to switch sddm theming to the Breeze style. They’re not all that different anyway. 
It’s a known issue…
I would advise monitoring that thread for any possible solutions.
A workaround appears to be to switch sddm theming to the Breeze style. They’re not all that different anyway.