u/Hot_Field4733

I drive a 2018 Hyundai Elantra 2.0L (none turbocharged) This has happened 3 times now, each time going slightly uphill and foot off the gas so lower rpm’s. My car will completely shut down, no bog down or stuttering, stop the car, put it in park and it starts right back up instantly no problem. Power/lights and radio stay on. No check engine light, but I have used a code reader to see if there is any stored codes to see if it’s a camshaft sensor or crankshaft sensor(none so far) I have tested the alternator and that is working just fine.
Any ideas on what it could be?