In the week and a half I've owned my Expedition, the temperature control knobs have randomly gone blank 3 times. By that I mean they don't show the temperature on them when the climate control is on. When I adjust the temperature, the changes show up on the Sync screen, but the knobs stay blank until I turn off the car and let it sit for a while. Has anyone else experienced this? I've attached a pic to show what I mean. Thanks!

