[RL] Sims in Dynasty suddenly despise each other

Different copy of my regular save. 

morrigxn​  seems to be correct: Opening Dynasty Details and clicking on the checkmark causes Dynasty Relationships to deteriorate.

I cheated everyone in the Dynasty to green. Gave the Heir the "Excellent Leadership" Sentiment.

I opened and closed the Dynasty Details menu. I did not make any changes. Just opened it and used the checkmark to close it.

The first time I opened and closed the Dynasty Details menu I immediately got a dialogue: New Romance Dynamic: Strained.

All Dynasty Relationships went down - except the Dynasty Head's household and her infant Grandson.

Each time I opened and closed the Dynasty Details menu, Dynasty Relationships declined. Until the Heir got the "Poor Leadership" Sentiment.

I repeated this with another Family Dynasty. Same results.

None of these Sims are in the Noble career.

And then! Not on your life. Not again.