Any hardie plank siding experts here? I have a 10 year old house with hardie plank siding. I've recently noticed some issues along some of the edges of the siding. In case it matters, it's mostly on the north side of the house (which gets less direct sunlight). It could have been this way for years and I only noticed now or it could be recent. But is this normal for 10 year old siding or is something going on here that needs attention? See pictures please.