Political marriages, lineages, and surnames

[Carbill66]

Secured the engagement of Vina to Duke Axel and, despite having previously discussed her and her future children's lineage and surname remaining Toras with Duke Axel (with positive feedback), after selecting the option to follow through, Pales opinion dropped from allied (post engagement) to unfriendly (post choosing Vina/ children remaining Toras). Anyone know if that is the intended result?

Update: every tick for updates they swap from allied to unfriendly and back again. Lost me a vote at the AN.