[FIXED] Sim swims under ground

One of these issues that seem to come and go.

Adding as needs Input to see if there's some kind of pattern.

EDIT: Added

I see the same thing happen every so often in my replica of S3LL's Natatorium, where the pool is on the third floor- so maybe it's pools built away from ground level in general?

I have this issue too, on the extra large lot in Brindleton... except my pool is on unedited terrain at normal ground level.

Product: The Sims 4
Platform:Mac
Which language are you playing the game in? English
How often does the bug occur? Rarely (0% - 9%)
What is your current game version number? 1.63.136.1210
What expansions, game packs, and stuff packs do you have installed? University, island living, get famous, seasons, cats and dogs, city living, get together, get to work, realm of magic, strangerville, jungle adventure, parenthood, vampires, dine out, spa day, tiny living, moschino, laundry day, fitness stuff, vintage glamour, romantic garden, movie hangout, spooky stuff, cool kitchen stuff
Steps: How can we find the bug ourselves? Have a pool on your lot
What happens when the bug occurs? Sim remains swimming when leaving confines of the pool and swims in terrain and on floors.
What do you expect to see? Sims swimming in water and nowhere else.
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. Since the big patch June 3.

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Has happened at my sim’s owned store and my flatmate who has a PC and some different packs just told me she had the same issue. Instead of getting out of the pool her sim just swum to the location she was being told to go. At my store I’ve found sims treading water inside a staircase and lots of splashing texture on the ground. Will take a photo and update this when it happens again. [EDITED TO ADD: Managed to get a screenshot of the splashing way above the pool but haven't had swimming in terrain or flooring again yet to screenshot]

I was really confused to see a lady swimming along the beach in Sulani but I figured it was a glitch because she was in really shallow water. Then I found her just swimming down a path. no idea what is causing it.

Since installing Island Living I now have this problem too. I noticed it on a residential lot in Newcrest. The swimming is more skilled with the expansion compared to the base game, but it is certainly very rough and almost painful to watch. Turns are sharp and they swim very fast, in addition to them swimming outside the pool. 

Can anyone experiencing this issue possibly share a save file with me where it's occurring? You can DM me the link to your save, thanks so much for the help!

Instructions for sending me your saves: http://answers.ea.com/t5/The-Sims-4-Bug-Reports/INFORMATION-How-to-Send-User-Files-to-The-Sims-4-Team/m-p/6065302

I had the same bug in Sulani recently. Here are the screenshots:
(Even though the bug is kinda funny, I wish it was fixed because I'm afraid it might make the game lag/freeze or something like that. The less bugs - the better 🙂)