[FIXED] [DO] Changing employee uniform resets progress

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? 1.62.67.1020
What expansions, game packs, and stuff packs do you have installed? Discover University, Island Living, Get Famous, Seasons, City Living, Get Together, Get to Work, Vampires, Dine Out, Spa Day, Outdoor Retreat, Backyard Stuff, Kids Room Stuff, Romantic Garden Stuff, Movie Hangout Stuff, Spooky Stuff, Cool Kitchen Stuff, Perfect Patio Stuff, Luxury Party Stuff, Holiday Celebration Pack
Steps: How can we find the bug ourselves? Purchase a restaurant, travel to the venue, go to restaurant settings, change uniforms from slot 1 to any other slot, hit the check mark.
What happens when the bug occurs? Everything but the choice of uniform is saved. Going back into restaurant settings, or opening the restaurant, reveals that the choice of uniform for either gender has not been changed from slot 1.
What do you expect to see? Well, I expect the game to actually save my choice of uniforms.
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes
Did this issue appear after a specific patch or change you made to your system? No

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Please note that while I've marked that I use mods and CC, I have tried removing all of them, even trying a fresh install, and a fresh world, and it made no difference, so I put all the mods and CC back.

At first, I couldn't even create custom uniforms. However, that part suddenly decided to work, but the issue outlined still persisted. The only workaround I found - by searching the internet - was to either edit the slot 1 uniform, or delete all preceeding uniforms until the uniform I wanted moved into slot 1.

Just for the heck of it, I tried loading up an old world and bought a restaurant, and weirdly, it just worked as it should, so I've no idea what happened there.

I do not have issues with progress resetting, or custom restaurant menus failing to save. Just the uniform slot change.