Hi Oddbird,

There's recently a major change to the anchor finding algorithm:

1. An element can use absolutely positioned anchors that come earlier in tree order
2. When there's a name conflict, we should use the last one instead of the first one

Please see w3c/csswg-drafts#8165 (especially comments after w3c/csswg-drafts#8165 (comment)) for more details about this change.