I had this a few months ago and the initial advice from the SC over the phone was to reboot the screens. That solved the problem for a while but it recurred after a couple of weeks. I got tired of rebooting so took it in for service. They could not find a specific cause for it. It has not happened again since then. I do recall reading somebody else's post on the same problem and in his case, they found on and off shorting of wires in the fuse box area (my recall may not be that accurate). Hope that helps. BTW, in no event did I ever notice any change in handling.