Sims won't do Romantic Interactions autonomously

Since Royalty and Legacy Pack Update, my sims now won't flirt with each other autonomously. whether they are already in a couple or sims who have a romance bar. Just keep repeating the same interactions like hug, kiss, get to know, and deep conversations. I have cheated my sims by changing their emotions to very flirty but still they don't have free romantic interactions with each other. So my sims won't flirt by themselves.  I play with autonomy on full .