That is strange, but your hugo config likely matters more than your R session info, I think. Looking at the docs for ghostwriter, it's not clear to me why your About page would have moved into your blogroll, if your menu settings remain the same. Is About appearing in two places?
I also noticed that ghostwriter has updated the min Hugo version to 0.41, so that's something worth matching.
Have you tried deleting your about page (including artifacts), and then re-adding it expressly as a page as opposed to a post? (I don't use ghostwriter, and the Hugo themes vary quite a bit in terms of how they structure content, but it seems like a move that'd be worth a shot— assuming all of this is backed up and under version control, etc.)