All buttons are not working in the control panel
 

During Summer, when I park my 8 outside for a moment, the whole control panel is dead including the mini LCD display, and I can only select the next song by using the steering wheel controls, I can't even adjust the air con.... and then about 20 mins later, when the inside of the car is cool down a bit (Lucky I selected the air con as Auto so when the engine started, the air con will run), then the LCD is starting to come back and the control buttons are back as well.

Do you guys have this problem as well??