I’m with @philippaeast on this one. Often if I find myself fiddling back and forward with one thing, it’s because the issue with that bit is actually because of a different bit being wrong. If that makes sense.
But also, yes to @jd73, it can just be about mood & what aspects of the book are at the forefront of my mind during that edit on that day. Reminds me of writing research papers with several co-authors and getting comments back with author A saying change sentence X to Y, and author B saying change sentence X to Z etc etc. And then them both being insulted if I ignored their edit. So editing a novel sometimes feels a little like having half a dozen co-authors in my head!!