I having a strange issue with starting up my Lusso about 2 weeks ago. I live in Las Vegas, Nevada area. We have and still having record heat and temperatures above normal this time of year. About two weeks ago, I press the engine start/stop button and had a couple of more seconds delay in the engine cranking up than normal. Had about a 1/4 tank of gas. Almost felt like a bad battery or fuel not getting in the engine with no engine codes showing whatever. Last night, I had the same issue, but the delay in cranking the engine was a few more seconds longer to start. I decided to turn off the engine and the Start/Stop engine button was only in accessory mode/tan color and would not turn green even with the brake pedal pressed! I decided to open the engine hood and let it cool down for a couple of minutes. My gas tank with full right before I parked the car; I use Chevron premium unleaded. It's was a hot day with temperatures ranging in the mid to lower 100's Fahrenheit at night. Finally the Start/Stop engine button turn green and was able to start it with no problems and the engine is running smooth and still no engine codes! I have Goodwin complete exhaust with GFB+ Diverter valve that are my mods. What could be going on?, puzzled!!