Automatic Transmission Control Module problems of the 2015 Mazda MAZDA3

The day was hot and I was in stop and go traffic with the ac set to 72 degrees in my 2015 Mazda 3 with just 21k miles on it. My car unexpectedly stalled and the check engine and charging system/battery lights came on briefly in the dash. I had to shift into park and push the button to restart my vehicle. The car's ecu/pcm did not set any codes and the problem has not occurred again since that hot day. This is a danger because the sudden loss of power could result in a rear end collision luckily I was in stop and go traffic. Dealer and Mazda have been slow to investigate this thoroughly. Feels like they just want to send me on my way without doing a thorough investigation of this issue.