Missing Milestones in "Connections: A Lectionary Commentary for Preaching and Worship: Year C"

Could it be possible to tag the "Connections: A Lectionary Commentary for Preaching and Worship" series with Bible reference milestones?

At the moment only Page Number and Lectionary Liturgical Calendar milestones are tagged. But that then does not allow the books to show up in the Commentaries Section in the  Passage Guide.

The "Feasting on the Word" series behaves like I would expect this one too.