Furious and Fancy! But what's broken?

I added the Regal Residence attribute to my Sims' lot. As a result, some of my Sims occasionally get the Furious and Fancy moodlet, which makes them angry because "[Name] hates it when broken items are nearby in their regal home."

I have been unable to figure out what items are broken. Any tips on how to figure out what broken item is setting off an infant or toddler?