It's unique to my theme, which uses a specific font and some custom LESS.
But I think I got it:
paragraph-spacing-after: @base / 4;
It seems that adding this spacing yanks the bullet out of place, but not consistently for some reason.
Sorry if my OP was unhelpful. I had tried commenting out lines until I found it and had failed to do so sometime ago. But second time's the
Edit: this seems to work OK, though it's not quite what I wanted:
paragraph-spacing-before: @base / 8;
paragraph-spacing-after: @base / 8;