And you're lucky if it's two. If they're not familiar with the rendering engine/docs system/API platform/middleware etc (or just think they aren't), or have low confidence in a debt ridden platform, they'll spend five minutes a day for a week or three theorizing on how it could have gone wrong, debating if, actually, it's correct the way it is, refreshing their knowledge of deep internals, debating if a fix could break something, and so on. Way safer to do that than risk making things worse in an uncertain system.