Today, in HV mode, at the light, my engine started charging my battery while my battery was over 80% charged. I was not it HV Charge mode. I knew I was not in HV charge mode because not only did it not say "Charge" on the dash, but when I tried to engage HV Charge the message said it was not available due the how charged my battery was already, but continued to charge. I then put it in EV mode, no change. Then turned the car on and off to get it to stop. Is this normal? Im on my first month of ownership of a 2020 clarity. Any ideas?