I'm not even sure it *IS* a problem - it's a Prius! It manages the ICE engine on
its own, and unless your battery is nearly drained, it would shut the engine
down at a stop light. Been driving Prius(es) for 8 years, I pretty much don't
even pay attention to whether the engine is running or not anymore. I just know
that when it's actually needed, it will be there. Do not freak out when the
engine stops - it's supposed to do it when its power is not needed.
That's a feature, not a problem. The engine is supposed to shut itself
off (to save fuel) when not needed, including when going downhill and
when the car is stopped. It will re-start automatically as needed to
keep the batteries charged. You will reach the point where you do not
notice whether the petrol engine is running or not.
I agree with almost everything that you have said and almost everything that
you will say in your entire life.
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