Dark square shadows under Sims

Product: The Sims 4
Platform:Mac
Which language are you playing the game in? English
How often does the bug occur? Every time (100%)
What is your current game version number? 1.66.139.1220
What expansions, game packs, and stuff packs do you have installed? Cats and Dogs, City Living, Seasons, Parenthood, Jungle Adventure, Laundry Day, and the Holiday Stuff pack.
Steps: How can we find the bug ourselves? Just open up the game and begin playing on any lot.
What happens when the bug occurs? A dark shadow appears under sims, and it disappears when zooming out. It also grows and glitches when sims interact with each other (hug, kiss, etc)
What do you expect to see? Regular looking shadows.
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? Neutral/Not Sure 

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This seems to be a visual glitch, and doesn't seem to affect my gameplay. I have noticed a lot of issues related to shadows in my game lately, including the square shadow one.