What's the relation between feelings of neither-pleasure-nor-pain and ignorance?

I often see in some suttas that there are some habitual tendencies that, after the arising of pleasent feeling or painful feelings, lead to suffering due to passion for the pleasure and aversion for the pain. But beside those two modes of feelings, there is a neutral kind of feeling, which neither-pleasent-nor-painful. In the suttas, such as MN 44 and MN 148, it is stated that neutral feeling accompanied with ignorance leads to suffering, because one does not see the gratification, the danger and the escape from suffering. I do understand the reasoning behind the two former modes of feelings and their relation with passion and aversion, but I can't grasp the idea behind neutral feelings and ignorance. Can someone explain the influence of ignorance over neutral feelings and its connection with suffering? Maybe some examples from the suttas or from everyday life might be helpful. Thanks for your time and patience!