(21 Feb so maybe too late to be useful...)
I've had the problems mentioned in the
Known Issues - mostly the bad behavior on rotated screens (mouse droppings, keystrokes queued until mouse moved), but also the monitors not being present until I fiddle around in Display Configuration, everything being called a DVI, etc. Plasma desktop with sddm, displaylink ver 5.2, nvidia GeForce 745 for main 4K screen, two Scepter 24" monitors on a Dell D3100 (one rotated)