Speaking of, I recently had it suddenly bulk pulling posts from another instance from years ago whenever I had set it to All & New posts, so I imagine it's some rough edges of Lemmy causing all these issues.

I've also been seeing the vote count totals fluctuating on posts, and occasionally the OP itself changing, so for instance instead of "Home page behaviour, particularly when it refreshes" & your text body, it may suddenly change to a completely different post. Comments remain the same and if I reply it's still to the OP/thread I'd opened, but scrolling back up, it's a little surprising to say the least.