2015 Lexus ES 350 radio screen stuck at "audio off" display

I am having a sililiar issue on my 2015 Lexus GS 350. Have you found the cause yet? My 2015 Lexus GS 350 Sport. Yesterday on a 140 mile drive, the radio locked up and I was unable to raise/lower volume, unable to turn off the radio or control navigation. The steering wheel radio/phone functions would not respond either. I got home, turned off vehicle and restarted it and everything worked ok. I have only driven the vehicle once after the incident and everything is ok so far. Vehicle only has 19,500 miles. Are others experiencing this condition and heard of a fix?