This has happened a number of times to me. I think it's related to the 5.8.4 upgrade but have no proof other than it never happened prior to the upgrade. When it happens, the driver's display will come up within 2-3 seconds but the center console will remain black for around 25 seconds (I've timed it by counting). I have set the left panel of the driver's display to show media and it remains blank during this period. The media doesn't play during this time and when it comes back, the audio volume is always turned down low (almost inaudible) even though I always leave it at least at 5. I don't think any other settings are affected. The car is driveable though backup cam and homelink don't work during this time. This happens once or twice a week and seems to be independent of sleep state. It has happened first thing in the morning after the car sat overnight and has happened after a 30 minute stop. It appears to happen randomly. I drive the car at least 3 times a day so it happens 1 in 15 to 30 times. I've rebooted the center console several times along the way but that doesn't seem to have any effect. Perhaps unrelated but after 5.8.4, the phone app never connects to the car. Any ideas?