Noises During Shifting problems of the 2016 Chevrolet Malibu Hybrid

5/4/2018 took the car to service a check engine light. They reprogramed the hybrid powertrain control module 2 - per a factory service bulletin but it did not fix the problem, light came back on. 5/26/2018 - 100 degrees. Car shut down while driving straight at 40 mph on city street. Restarted in some kind of default mode without ev components after 30 min. Next day it worked fine. 8/12/2018 - 86 degrees. Car shut down while driving straight on city street going 30mph. Restarted and drove fine but later the same day after starting the car and shifting to reverse the car moved forward, car was in ev mode. Shifted to neutral and car still moved forward, still in ev mode. Shifted to reverse and neutral again the car still moved forward, still in ev mode. Turned off engine, restarted and worked fine, still in ev mode. 8/16/2018 - 85 degrees. Car shut down while driving, restarted and worked. But later that day I started the car and shifted into reverse and the car moved forward, car in ev mode. I shifted to neutral but at the same moment the engine started and I felt and heard a shifting noise and the car worked fine. 2nd appointment will dealer on 8/20/16, appears a common factor is warm days when I park the car outside in the sun. No matter what the problem may be there is a serious and potentially deadly symptom of a problem with my car and could become a common problem. The next step the dealer will do is replace a wiring harness, again per a service bulletin so the manufacturer does know of a problem.