Multiple ServiceNPCs showing up

Yep, just happened to me. Have free services and tried firing all the ugly simsmas sweater nannies and they came right back even after a save/  log out.

I’ve managed to reproduce this bug simply by

1. Having an infant
2. Hiring a nanny
3. Traveling out of the lot
4. Returning home

Upon return, the original nanny will still be on the lot, and a second nanny will spawn, with the “Hello!” notification and all. Both will need dismissing and will charge the household. 

Have this issue, every time you leave the lot and return a new nanny will spawn. I currently have about 6/7 nannies. Amusing but they keep getting in each others' way and the kids aren't being cared for. 

I'm currently only playing with the base game

my sim has a baby, goes to work, a nanny comes. (all totally normal) 

baby ages up to infant, then toddler, then kid. nanny has not left once. (such a caring woman.)

nanny never sleeps. (wow, she seems superhuman.)

nanny gets fired.

sim goes off with rocketship, and automatically there is a nanny hired for the kid. (all good and well.)

within a few seconds, there are FIVE nannies introducing themselves, walking into my sims' home. 

my sim has one kid. she does not need 5 people for that.

My game keeps spawning new ranch hands. I have got at least 15 now and there is still coming more. I tried closing but that doesn't fix the issue. When i restart te game they just continue spawning.

Does anyone else get multiple nannies coming at the same time? They tend to never leave, and also, I have 3 on my lot right now!!