Sims washing hands in sink in different bathroom (Patch 1.117.288)

I've been noticing that as well whenever my three young adult Sims are spending some time at The Blue Velvet Nightclub. I think this also occurs at their residence (2 floors plus a basement that I've added). I have Windows 10 and is using both mods and CC.

My (young adult) Sim has 2 floors plus a basement. She added the second floor for her master suite and a game room, and added the basement for a TV/movie room.

Anyway, it's just weird when she walks up or down a flight of stairs to use a sink, when there was a perfectly functional sink in the restroom where she used the toilet.

Mine will do that, too! I can't find a reason for them doing this. I'm wondering if this is related to sims using other objects like counters that are clear across the building instead of the one they were standing next to? Or other similar situations that have been going on forever? Drives me insane! I make sure not to have counters in any other room than the one dedicated kitchen space. Or taking their dishes across the house to wash them instead of using any of the multiple options closer by. 
I'm on a macbook air laptop and using a few mods specifically: MCCC, Carl's collectables ready, amellce sit steady, xml injector, Lot 51 Core but I have this issue even when I disable & clear out my mods folder. so idk 

I noticed this too very recently, it was fine before and it has been fine for a long time, I would since they released the update to choose if its a kitchen or bathroom sink... I have set them appropriately and now sometime my sims will use one sink that is much far away from them.

I noticed its like the in The Sims 1, where if you were going to a community lot, sims all around in the lot would gather to the place where the camera/the player is looking at, to make the game look busy... it reminds me of that because each time I realized sims were washing their hands in a sink that is far away, its because I look at that sink, while I sent them previously to the toilet, closest to where they were... unless the sink is set to kitchen of course.

This just started happening to me yesterday. He used the toilet on the first floor and now walks upstairs to the second floor to use the sink. I recently downloaded a new house off the gallery and moved them in but I kept all of my furnishings from the old house. I know it is the matching sink and toilet because this is from the sleek bathroom kit and I only have it in the guest bathroom in each house. 

Hello all,

If any of you are still encountering this on the latest game version (without mods), would you be willing to share your save file(s)?

If so, please send me a private message with a link to the file. Instructions can be found here: https://forums.ea.com/idea/the-sims-4-bug-reports-en/information-how-to-send-user-files-to-the-sims-4-team/5048472

Thanks!

The problem I am having is similar: I have created a bakery as a small business and included a kitchen... On the upper floor, the sim lives with his household and they have a kitchen there. So the sim gets the food in the refrigerator on the ground floor than goes to the upper floor to use the oven. (I do not use mod but I do have some CC, like hairs, in my game)

Hello I’m experiencing this bug too but I’m on Xbox one. I can’t share my files with you can I?