White line traverses center
by Whoandwhatitis moderator
The white line that traverses the center appears to do so only in Normal and Zoom views, but not in Slice view. This makes me think it's an illusion in Normal/Zoom views. You might still mark it, if it looks weird to you. I think I'd personally mark it as an off-center vertex with either 3 or 5 particles, based on those two views.