This happened with my car the other day, couldnt get the screen to come on or wake up. Finally after about 2 or 3 minutes screen went into its bootup with T logo and it finally did come up. If its a once in a while thing that might be normal, especially after an update. But if its an "every day" thing, prob wouldnt hurt to reach out to Tesla Service and see if they can do a diagnostics check remotely, see if the car looks ok from their end.