Visual Glitch with Pop-Up Dialogue Boxes and Menus

Product: The Sims 4
Platform:PC
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? 1.70.84.1020
What expansions, game packs, and stuff packs do you have installed? All
Steps: How can we find the bug ourselves? Unsure; occurs with most but not all pop-up menus during gameplay, as well as mods pop-up at game start.
What happens when the bug occurs? The bug is a visual glitch in which some pop-up dialogue boxes and menus consistently have the borders cut off, flipped, or otherwise in incorrect spaces, resulting in boxes off to the side, left-side borders off-set from the right, etc. Offers to go on dates, outings and other menus from phone calls are all affected, as well as adoption menus, mods pop-up at the start of the game, rocket ship and job event menus, possibly more.
What do you expect to see? No visual glitches. 🙂
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. Began occurring immediately upon starting up the game following the 1.21.2021 patch, removing mods has made no difference in the glitch's occurrence, nor has removing and reinstalling the game via the Origin client.

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I think it's worth noting that certain menus, such as the "hire a service" menu from the phone does -not- have any visual glitches as far as I can tell, but other sub menus from that are having the issue. It is occurring across households in existing saves. I have not yet tested if it is a save-related bug, seeing as how it includes the pop-up from the main menu I doubt it is, but will be starting a new save soon to test just in case.