It must be a bug, then. I’ve tried resetSim, travelling to another lot, and even restarting my computer. I’m currently running Repair Game, so I’m hoping that will fix it.
On a related note, does anyone know if MCCC can cause this problem? I haven’t tried removing mods yet, but I’d at least like to keep MCCC installed.
EDIT: It was a mod issue. Turned out I had several outdated mods installed. Thankfully I didn’t have to remove any mods; updating the outdated ones fixed the problem. ^_^