Auto-save.171323361823.save

Suppiluliuma.172323361823-2.save

In my Suppiluliuma campaign I am trying to get the Muwatalli gratitude achievement, however my vassals relations should be improving, but they are not. The trend is upwards to 150, but they go from 70 to 68 over the turns. Save file attached.
This is the relations on the auto save the turn before