Tacx Genius delayed power response

Hey there. My 1st Post here.
When riding on my Tacx Genius I recognize since some time already now, that when I vary the power input on my bike, that the response in the screen is very much delayed.
This effect is at least 2-3 secs and makes a couple of events and races very difficult to control. Resistance response back to the bike when going from flat to uphill or reverse is same delayed
Any ideas where to calibrate update / repair.
Thx a lot.