I think you've misunderstood the comment you were replying to. I think they mean that the bacteria will not reach room temperature (20℃), but will get just war

I think you've misunderstood the comment you were replying to. I think they mean that the bacteria will not reach room temperature (20℃), but will get just warm enough to thaw out (1℃ or 2℃). The reason they could die is probably not heat, but lack of anything to eat.