Receiving Notifications from other Households

I just got a notification for a sim that I do not play. She was not in my sims house and only one of my sims has met her and she is just an acquaintance. Never seen a notification for a sim I don't even play that I can think of. I scoured the neighborhood and found her in a park at a food stall. But that still doesn't explain why I would get a wall notification for a sim that means nothing to my household. My sims house is directly north in the photo where you can see her at the food stall. 

im getting this issue with the fishing notifications. No mods / cc

I've had several instances of this across several saves now, where I will get a social notification from two non-household sims having a conversation somewhere else on the lot.

"Sim A has learned Sim B's financial status..."; "Sim A has learned Sim B's career..."; etc. while I'm playing with neither Sim, have never played with them, and do not have either of those sims in my household.

In the attached photo, in the notifications, I'm getting a notification for Yoltic, and he is somewhere else on the lot (my Sim also had not interacted with him at all). I've seen this happen with both premade and randomly generated townies