2017 Nissan Altima — car died once at a light and restarted immediately

Write down what you already tried. A second data point from another 2017 Nissan Altima owner helps more than a generic diagnosis. I'd do that before spending real money. If it doesn't change the out-the-door or the repair estimate, it's noise. I'd sleep better after that step, even if it finds nothing. If this is nothing, great. I want that in data.