I recently purchased a 2018 Sonata SEL and I'm having an issue starting it in the mornings. If I leave it overnight and then start it early in the morning, it fires up just fine. But if I let it sit for longer, and don't attempt to start it until later in the day, then I start to have problems. With my foot on the brake, I press the button and it appears to go into an on state (as in it skips acc mode and everything comes on like the engine started, so I know its not the brake sensor). Everything comes on except the AV System and the HVAC system. It takes about 10 seconds for the AV system to activate, and another 10-20 seconds for the HVAC system to engage. After that if I press the button, it shuts everything down and gives me my drive info as if I had shut off the engine. It continues to do this for a couple minutes until the engine will finally start. I called the dealership I bought it from and they told me to check my battery. So I took it to autozone and they said the battery is fine as well as the charging system. I don't know what is happening
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