Car starts when cold go to the store car cranks but won't start until 5/6 min later battery is strong

What is your question?

I noticed about a week ago my room during start is 1100 rpm then drops to 750rpm after 6/7min high idel at 1/2 nd gear 1500.... Today went to the store 5 min away went back to the car and wouldn't start until I let it rest for 5 minutes

How long has your 2012 Hyundai Sonata had this problem?

1 week