So I also get the same display issue, which in itself isn't so bad, but there's more: After I play for more than a few minutes, the controller will send seemingly random MIDI notes on the MIDI out port at random velocities whenever I press a key. So the note transmitted no longer corresponds to the key pressed. Only thing that will help is turning it off and on again. This seems to happen only when a sustain pedal is connected and used.
I tried to upgrade to 220.127.116.11 but the software tells me there's been an error while updating. Factory reset won't help either.
I just got my Keylab today and must say I expected a little more from a 800 € controller. Seriously thinking of returning it.