[FIXED] [MWS] 'Just A Spot of Tea' Tea Set disappears

Product: The Sims 4
Platform:PC
Which language are you playing the game in? English
How often does the bug occur? Often (50% - 99%)
What is your current game version number? 1.84.197.1030 (64 Bit)
What expansions, game packs, and stuff packs do you have installed? All packs except Oasis Kit.
Steps: How can we find the bug ourselves? Play a household and put a tea set somewhere in the house. Use it to serve tea at least once and then rotate away from the household or have Sims travel to other locations or go on vacation. The tea set will completely disappear sometimes (not every time) upon returning to the household lot. It also happens with tea sets placed on community lots Use the tea set to serve tea on the community lot and then have the sims return home. Return to the lot each day, after a few visits, sometimes just 1, the tea set will disappear.
What happens when the bug occurs? The tea sets from MWS pack eventually disappear.
What do you expect to see? ...the tea sets not disappearing...
Have you installed any customization with the game, e.g. Custom Content or Mods? Not now. I've removed them.
Did this issue appear after a specific patch or change you made to your system? Yes
Please describe the patch or change you made. Well, I mean the tea sets weren't in the game until the most recent patch and game pack...

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Originally I thought this bug only was happening if I left the lot with the tea set needing to be cleaned, but I can now confirm it even happens when the tea set is in the state waiting to be steeped or even if it has never been used.

Edit: Some additional information, I have a little more understanding as to why they are disappearing. After modding the tea set with the simple change of letting it be put into a Sim's personal inventory (my short term solution to keep them from vanishing) I found that the sim gets the option to "Clean out spoiled food" after the tea set has been around for a while. Choosing that option turns the tea set into a pile of dirty dishes, just like if it were spoiled food.

So, basically, the problem is that the tea set itself spoils, even if it has never been used. It's not set up with a tooltip to show a spoil timer on mouseover though, so we don't see that it is happening. 

I have a similiar issue with the tea sets just disappearing when my sims leave a lot.   It has happened to tea sets on community lots, tea sets on residential lots and tea sets in an apartment in San Myshuno.  Originally I thought it might be only happening when I left the tea set in the state where it needs to be cleaned but I have since had it also happen when it has already been cleaned.

I made a new bug report here but I suspect it is the same bug as this report had, and it's not actually related to vacations or maids.

https://answers.ea.com/t5/Bug-Reports/My-Wedding-Stories-Tea-Sets-disappear-completely/m-p/11335891#M208728

I've had this issue happen with a brand new, unused tea set, as well as tea sets that have been used.  When your sim leaves the lot and comes back, the tea set is gone.

I just had it happen today with a brand new tea set myself.   I bought yet another one (3rd one for that particular household), and then left the lot with my controlled sims to work at the retail store.  It didn't disappear the first day when I did this, but it was gone upon returning home the 2nd time.

Hello.

For anyone encountering this issue without mods or custom content installed - would you be willing to share affected saves?  It may be helpful to share a save from both before and after the issue occurs.

Instructions on how to share saves are here:
https://answers.ea.com/t5/Bug-Reports/INFORMATION-How-to-Send-User-Files-to-The-Sims-4-Team/m-p/6065302

Update: The team no longer needs affected save files for this issue and will be investigating.

I’ve also noticed that my Sims look like they smell something bad when they are in the room with the tea set even if it’s clean. Even if it’s new and never been used. 

I have some additional info on this problem that I think is relevant.

If I use the tea set frequently, it doesn't seem to disappear. It only disappears if I go a day or two without using it.
Could just be coincidence, but at this point it's pattern that was worth mentioning.

I have only had the set disappear in a game with mods, so I can‘t share my file. What I noticed in a game without any mods though is, that sims frequently prepare tea without pouring it, the tea then spoils and the tea set becomes a dirty object that gives sims the „dirty surrounding“ moodlet or make them do the corresponding animation. Because the set doesn‘t have a smelly cloud over it when dirty, this can go unnoticed for a while which matches @JaggidEdje s observation. At the moment I’d guess maids or the game (on household swap) clean what they consider to be spoiled food or trash. 

Also as mentioned by someone above, it sometimes doesn‘t seem to clean properly and makes sim react to it as if it was a dirty object even though it was recently cleaned. I tested this by dragging it in and out of the room in which my neat sim was currently reading.